Big-Ass Numbers At right you will find a list of very large number names up to 103000 using the Conway-Wechsler System and the short scale. There have been other number naming systems throughout history, and there are several other web pages out there listing large numbers using them, but the Conway-Wechsler system seems to be becoming the standard for very large numbers over a Centillion (10303). Site created by Steve Olsen. If you see any errors or have any comments, please email me. Reader Comments Lyn Fatolitis writes: Thanks so much for this website, I use it all of the time at work and I love the name! lol Leisa Horn writes: I wanted to thank you for your site. My son is seven years old and is completely fascinated by numbers. He understands them too. (I know he understand them because I have lots of experience - I have a masters in education - I was a military intelligence officer for the Army for many years so I am not just guessing he understands, I can see he does) - For months now he has been exploring the names of very high numbers and is fixated on googol and googolplex. The other day he sat down and wrote out millinillon. it took him over an hour to write out the 1000 zeros. He asked me to take a picture of it! see picture below. In fact, he is asking Santa Clause for the first and last volume of Googolplex Written Out. He wanted all the volumes but I talked him out of that, frankly I do not have the space nor the money for such a set of volumes. lol!! He also wanted me to print out your site of numbers - which I am doing right now. 25 pages of names of numbers and he is so excited waiting by the printer. Done and in a binder with sheet protectors. Thanks again. Have a great day! Alex Bradley writes: I believe I've found a mistake on your page of big numbers, index 96 (10^291). You've listed this number as "Sexnonagintillion", but I believe it should be "Senonagintillion" - having dropped the "x". The reason being that the Conway-Weschler specification doesn't indicate that the "se-" prefix gains an "x" when preceeding "nonaginta-". On this page it specifies in the rules that an "x" should be appended to "se-" if the following prefix is tagged with "(x)" in the table at the top. "nonaginta" (10's column, row 9) doesn't have any tags. For contrast, "octoginta" above it does, so we should have "sexoctoginta" and "senonaginta", but not "sexnonaginta" or "sesnonaginta". Excellent comprehensive list by the way! Thanks for pointing out the error, Alex! It has been corrected. --Steve Eric Undertale writes: I love your website, this website helped me make a list on paper of these numbers! I went up to a Millinillion.

Base ‑illion Value U.S. Name Value in numerals / Comments 0 103 Thousand 1,000 1 106 Million 1,000,000 2 109 Billion 1,000,000,000 3 1012 Trillion 1,000,000,000,000 4 1015 Quadrillion 1,000,000,000,000,000 5 1018 Quintillion 1,000,000,000,000,000,000 6 1021 Sextillion 1,000,000,000,000,000,000,000 7 1024 Septillion 1,000,000,000,000,000,000,000,000 8 1027 Octillion 1,000,000,000,000,000,000,000,000,000 9 1030 Nonillion 1,000,000,000,000,000,000,000,000,000,000 10 1033 Decillion ...you get the point 11 1036 Undecillion 12 1039 Duodecillion 13 1042 Tredecillion 14 1045 Quattuordecillion 15 1048 Quindecillion 16 1051 Sedecillion 17 1054 Septendecillion 18 1057 Octodecillion 19 1060 Novendecillion 20 1063 Vigintillion 21 1066 Unvigintillion 22 1069 Duovigintillion 23 1072 Tresvigintillion 24 1075 Quattuorvigintillion 25 1078 Quinvigintillion 26 1081 Sesvigintillion 27 1084 Septemvigintillion 28 1087 Octovigintillion 29 1090 Novemvigintillion 30 1093 Trigintillion 31 1096 Untrigintillion 32 1099 Duotrigintillion A Googol = 10 Duotrigintillion (10100) 33 10102 Trestrigintillion 34 10105 Quattuortrigintillion 35 10108 Quintrigintillion 36 10111 Sestrigintillion 37 10114 Septentrigintillion 38 10117 Octotrigintillion 39 10120 Noventrigintillion 40 10123 Quadragintillion 41 10126 Unquadragintillion 42 10129 Duoquadragintillion 43 10132 Tresquadragintillion 44 10135 Quattuorquadragintillion 45 10138 Quinquadragintillion 46 10141 Sesquadragintillion 47 10144 Septenquadragintillion 48 10147 Octoquadragintillion 49 10150 Novenquadragintillion 50 10153 Quinquagintillion 51 10156 Unquinquagintillion 52 10159 Duoquinquagintillion 53 10162 Tresquinquagintillion 54 10165 Quattuorquinquagintillion 55 10168 Quinquinquagintillion 56 10171 Sesquinquagintillion 57 10174 Septenquinquagintillion 58 10177 Octoquinquagintillion 59 10180 Novenquinquagintillion 60 10183 Sexagintillion 61 10186 Unsexagintillion 62 10189 Duosexagintillion 63 10192 Tresexagintillion 64 10195 Quattuorsexagintillion 65 10198 Quinsexagintillion 66 10201 Sesexagintillion 67 10204 Septensexagintillion 68 10207 Octosexagintillion 69 10210 Novensexagintillion 70 10213 Septuagintillion 71 10216 Unseptuagintillion 72 10219 Duoseptuagintillion 73 10222 Treseptuagintillion 74 10225 Quattuorseptuagintillion 75 10228 Quinseptuagintillion 76 10231 Seseptuagintillion 77 10234 Septenseptuagintillion 78 10237 Octoseptuagintillion 79 10240 Novenseptuagintillion 80 10243 Octogintillion 81 10246 Unoctogintillion 82 10249 Duooctogintillion 83 10252 Tresoctogintillion 84 10255 Quattuoroctogintillion 85 10258 Quinoctogintillion 86 10261 Sexoctogintillion 87 10264 Septemoctogintillion 88 10267 Octooctogintillion 89 10270 Novemoctogintillion 90 10273 Nonagintillion 91 10276 Unnonagintillion 92 10279 Duononagintillion 93 10282 Trenonagintillion 94 10285 Quattuornonagintillion 95 10288 Quinnonagintillion 96 10291 Senonagintillion 97 10294 Septenonagintillion 98 10297 Octononagintillion 99 10300 Novenonagintillion 100 10303 Centillion 101 10306 Uncentillion 102 10309 Duocentillion 103 10312 Trescentillion 104 10315 Quattuorcentillion 105 10318 Quincentillion 106 10321 Sexcentillion 107 10324 Septencentillion 108 10327 Octocentillion 109 10330 Novencentillion 110 10333 Decicentillion 111 10336 Undecicentillion 112 10339 Duodecicentillion 113 10342 Tredecicentillion 114 10345 Quattuordecicentillion 115 10348 Quindecicentillion 116 10351 Sedecicentillion 117 10354 Septendecicentillion 118 10357 Octodecicentillion 119 10360 Novendecicentillion 120 10363 Viginticentillion 121 10366 Unviginticentillion 122 10369 Duoviginticentillion 123 10372 Tresviginticentillion 124 10375 Quattuorviginticentillion 125 10378 Quinviginticentillion 126 10381 Sesviginticentillion 127 10384 Septemviginticentillion 128 10387 Octoviginticentillion 129 10390 Novemviginticentillion 130 10393 Trigintacentillion 131 10396 Untrigintacentillion 132 10399 Duotrigintacentillion 133 10402 Trestrigintacentillion 134 10405 Quattuortrigintacentillion 135 10408 Quintrigintacentillion 136 10411 Sestrigintacentillion 137 10414 Septentrigintacentillion 138 10417 Octotrigintacentillion 139 10420 Noventrigintacentillion 140 10423 Quadragintacentillion 141 10426 Unquadragintacentillion 142 10429 Duoquadragintacentillion 143 10432 Tresquadragintacentillion 144 10435 Quattuorquadragintacentillion 145 10438 Quinquadragintacentillion 146 10441 Sesquadragintacentillion 147 10444 Septenquadragintacentillion 148 10447 Octoquadragintacentillion 149 10450 Novenquadragintacentillion 150 10453 Quinquagintacentillion 151 10456 Unquinquagintacentillion 152 10459 Duoquinquagintacentillion 153 10462 Tresquinquagintacentillion 154 10465 Quattuorquinquagintacentillion 155 10468 Quinquinquagintacentillion 156 10471 Sesquinquagintacentillion 157 10474 Septenquinquagintacentillion 158 10477 Octoquinquagintacentillion 159 10480 Novenquinquagintacentillion 160 10483 Sexagintacentillion 161 10486 Unsexagintacentillion 162 10489 Duosexagintacentillion 163 10492 Tresexagintacentillion 164 10495 Quattuorsexagintacentillion 165 10498 Quinsexagintacentillion 166 10501 Sesexagintacentillion 167 10504 Septensexagintacentillion 168 10507 Octosexagintacentillion 169 10510 Novensexagintacentillion 170 10513 Septuagintacentillion 171 10516 Unseptuagintacentillion 172 10519 Duoseptuagintacentillion 173 10522 Treseptuagintacentillion 174 10525 Quattuorseptuagintacentillion 175 10528 Quinseptuagintacentillion 176 10531 Seseptuagintacentillion 177 10534 Septenseptuagintacentillion 178 10537 Octoseptuagintacentillion 179 10540 Novenseptuagintacentillion 180 10543 Octogintacentillion 181 10546 Unoctogintacentillion 182 10549 Duooctogintacentillion 183 10552 Tresoctogintacentillion 184 10555 Quattuoroctogintacentillion 185 10558 Quinoctogintacentillion 186 10561 Sexoctogintacentillion 187 10564 Septemoctogintacentillion 188 10567 Octooctogintacentillion 189 10570 Novemoctogintacentillion 190 10573 Nonagintacentillion 191 10576 Unnonagintacentillion 192 10579 Duononagintacentillion 193 10582 Trenonagintacentillion 194 10585 Quattuornonagintacentillion 195 10588 Quinnonagintacentillion 196 10591 Senonagintacentillion 197 10594 Septenonagintacentillion 198 10597 Octononagintacentillion 199 10600 Novenonagintacentillion 200 10603 Ducentillion 201 10606 Unducentillion 202 10609 Duoducentillion 203 10612 Treducentillion 204 10615 Quattuorducentillion 205 10618 Quinducentillion 206 10621 Seducentillion 207 10624 Septenducentillion 208 10627 Octoducentillion 209 10630 Novenducentillion 210 10633 Deciducentillion 211 10636 Undeciducentillion 212 10639 Duodeciducentillion 213 10642 Tredeciducentillion 214 10645 Quattuordeciducentillion 215 10648 Quindeciducentillion 216 10651 Sedeciducentillion 217 10654 Septendeciducentillion 218 10657 Octodeciducentillion 219 10660 Novendeciducentillion 220 10663 Vigintiducentillion 221 10666 Unvigintiducentillion 222 10669 Duovigintiducentillion 223 10672 Tresvigintiducentillion 224 10675 Quattuorvigintiducentillion 225 10678 Quinvigintiducentillion 226 10681 Sesvigintiducentillion 227 10684 Septemvigintiducentillion 228 10687 Octovigintiducentillion 229 10690 Novemvigintiducentillion 230 10693 Trigintaducentillion 231 10696 Untrigintaducentillion 232 10699 Duotrigintaducentillion 233 10702 Trestrigintaducentillion 234 10705 Quattuortrigintaducentillion 235 10708 Quintrigintaducentillion 236 10711 Sestrigintaducentillion 237 10714 Septentrigintaducentillion 238 10717 Octotrigintaducentillion 239 10720 Noventrigintaducentillion 240 10723 Quadragintaducentillion 241 10726 Unquadragintaducentillion 242 10729 Duoquadragintaducentillion 243 10732 Tresquadragintaducentillion 244 10735 Quattuorquadragintaducentillion 245 10738 Quinquadragintaducentillion 246 10741 Sesquadragintaducentillion 247 10744 Septenquadragintaducentillion 248 10747 Octoquadragintaducentillion 249 10750 Novenquadragintaducentillion 250 10753 Quinquagintaducentillion 251 10756 Unquinquagintaducentillion 252 10759 Duoquinquagintaducentillion 253 10762 Tresquinquagintaducentillion 254 10765 Quattuorquinquagintaducentillion 255 10768 Quinquinquagintaducentillion 256 10771 Sesquinquagintaducentillion 257 10774 Septenquinquagintaducentillion 258 10777 Octoquinquagintaducentillion 259 10780 Novenquinquagintaducentillion 260 10783 Sexagintaducentillion 261 10786 Unsexagintaducentillion 262 10789 Duosexagintaducentillion 263 10792 Tresexagintaducentillion 264 10795 Quattuorsexagintaducentillion 265 10798 Quinsexagintaducentillion 266 10801 Sesexagintaducentillion 267 10804 Septensexagintaducentillion 268 10807 Octosexagintaducentillion 269 10810 Novensexagintaducentillion 270 10813 Septuagintaducentillion 271 10816 Unseptuagintaducentillion 272 10819 Duoseptuagintaducentillion 273 10822 Treseptuagintaducentillion 274 10825 Quattuorseptuagintaducentillion 275 10828 Quinseptuagintaducentillion 276 10831 Seseptuagintaducentillion 277 10834 Septenseptuagintaducentillion 278 10837 Octoseptuagintaducentillion 279 10840 Novenseptuagintaducentillion 280 10843 Octogintaducentillion 281 10846 Unoctogintaducentillion 282 10849 Duooctogintaducentillion 283 10852 Tresoctogintaducentillion 284 10855 Quattuoroctogintaducentillion 285 10858 Quinoctogintaducentillion 286 10861 Sexoctogintaducentillion 287 10864 Septemoctogintaducentillion 288 10867 Octooctogintaducentillion 289 10870 Novemoctogintaducentillion 290 10873 Nonagintaducentillion 291 10876 Unnonagintaducentillion 292 10879 Duononagintaducentillion 293 10882 Trenonagintaducentillion 294 10885 Quattuornonagintaducentillion 295 10888 Quinnonagintaducentillion 296 10891 Senonagintaducentillion 297 10894 Septenonagintaducentillion 298 10897 Octononagintaducentillion 299 10900 Novenonagintaducentillion 300 10903 Trecentillion 301 10906 Untrecentillion 302 10909 Duotrecentillion 303 10912 Trestrecentillion 304 10915 Quattuortrecentillion 305 10918 Quintrecentillion 306 10921 Sestrecentillion 307 10924 Septentrecentillion 308 10927 Octotrecentillion 309 10930 Noventrecentillion 310 10933 Decitrecentillion 311 10936 Undecitrecentillion 312 10939 Duodecitrecentillion 313 10942 Tredecitrecentillion 314 10945 Quattuordecitrecentillion 315 10948 Quindecitrecentillion 316 10951 Sedecitrecentillion 317 10954 Septendecitrecentillion 318 10957 Octodecitrecentillion 319 10960 Novendecitrecentillion 320 10963 Vigintitrecentillion 321 10966 Unvigintitrecentillion 322 10969 Duovigintitrecentillion 323 10972 Tresvigintitrecentillion 324 10975 Quattuorvigintitrecentillion 325 10978 Quinvigintitrecentillion 326 10981 Sesvigintitrecentillion 327 10984 Septemvigintitrecentillion 328 10987 Octovigintitrecentillion 329 10990 Novemvigintitrecentillion 330 10993 Trigintatrecentillion 331 10996 Untrigintatrecentillion 332 10999 Duotrigintatrecentillion 333 101002 Trestrigintatrecentillion 334 101005 Quattuortrigintatrecentillion 335 101008 Quintrigintatrecentillion 336 101011 Sestrigintatrecentillion 337 101014 Septentrigintatrecentillion 338 101017 Octotrigintatrecentillion 339 101020 Noventrigintatrecentillion 340 101023 Quadragintatrecentillion 341 101026 Unquadragintatrecentillion 342 101029 Duoquadragintatrecentillion 343 101032 Tresquadragintatrecentillion 344 101035 Quattuorquadragintatrecentillion 345 101038 Quinquadragintatrecentillion 346 101041 Sesquadragintatrecentillion 347 101044 Septenquadragintatrecentillion 348 101047 Octoquadragintatrecentillion 349 101050 Novenquadragintatrecentillion 350 101053 Quinquagintatrecentillion 351 101056 Unquinquagintatrecentillion 352 101059 Duoquinquagintatrecentillion 353 101062 Tresquinquagintatrecentillion 354 101065 Quattuorquinquagintatrecentillion 355 101068 Quinquinquagintatrecentillion 356 101071 Sesquinquagintatrecentillion 357 101074 Septenquinquagintatrecentillion 358 101077 Octoquinquagintatrecentillion 359 101080 Novenquinquagintatrecentillion 360 101083 Sexagintatrecentillion 361 101086 Unsexagintatrecentillion 362 101089 Duosexagintatrecentillion 363 101092 Tresexagintatrecentillion 364 101095 Quattuorsexagintatrecentillion 365 101098 Quinsexagintatrecentillion 366 101101 Sesexagintatrecentillion 367 101104 Septensexagintatrecentillion 368 101107 Octosexagintatrecentillion 369 101110 Novensexagintatrecentillion 370 101113 Septuagintatrecentillion 371 101116 Unseptuagintatrecentillion 372 101119 Duoseptuagintatrecentillion 373 101122 Treseptuagintatrecentillion 374 101125 Quattuorseptuagintatrecentillion 375 101128 Quinseptuagintatrecentillion 376 101131 Seseptuagintatrecentillion 377 101134 Septenseptuagintatrecentillion 378 101137 Octoseptuagintatrecentillion 379 101140 Novenseptuagintatrecentillion 380 101143 Octogintatrecentillion 381 101146 Unoctogintatrecentillion 382 101149 Duooctogintatrecentillion 383 101152 Tresoctogintatrecentillion 384 101155 Quattuoroctogintatrecentillion 385 101158 Quinoctogintatrecentillion 386 101161 Sexoctogintatrecentillion 387 101164 Septemoctogintatrecentillion 388 101167 Octooctogintatrecentillion 389 101170 Novemoctogintatrecentillion 390 101173 Nonagintatrecentillion 391 101176 Unnonagintatrecentillion 392 101179 Duononagintatrecentillion 393 101182 Trenonagintatrecentillion 394 101185 Quattuornonagintatrecentillion 395 101188 Quinnonagintatrecentillion 396 101191 Senonagintatrecentillion 397 101194 Septenonagintatrecentillion 398 101197 Octononagintatrecentillion 399 101200 Novenonagintatrecentillion 400 101203 Quadringentillion 401 101206 Unquadringentillion 402 101209 Duoquadringentillion 403 101212 Tresquadringentillion 404 101215 Quattuorquadringentillion 405 101218 Quinquadringentillion 406 101221 Sesquadringentillion 407 101224 Septenquadringentillion 408 101227 Octoquadringentillion 409 101230 Novenquadringentillion 410 101233 Deciquadringentillion 411 101236 Undeciquadringentillion 412 101239 Duodeciquadringentillion 413 101242 Tredeciquadringentillion 414 101245 Quattuordeciquadringentillion 415 101248 Quindeciquadringentillion 416 101251 Sedeciquadringentillion 417 101254 Septendeciquadringentillion 418 101257 Octodeciquadringentillion 419 101260 Novendeciquadringentillion 420 101263 Vigintiquadringentillion 421 101266 Unvigintiquadringentillion 422 101269 Duovigintiquadringentillion 423 101272 Tresvigintiquadringentillion 424 101275 Quattuorvigintiquadringentillion 425 101278 Quinvigintiquadringentillion 426 101281 Sesvigintiquadringentillion 427 101284 Septemvigintiquadringentillion 428 101287 Octovigintiquadringentillion 429 101290 Novemvigintiquadringentillion 430 101293 Trigintaquadringentillion 431 101296 Untrigintaquadringentillion 432 101299 Duotrigintaquadringentillion 433 101302 Trestrigintaquadringentillion 434 101305 Quattuortrigintaquadringentillion 435 101308 Quintrigintaquadringentillion 436 101311 Sestrigintaquadringentillion 437 101314 Septentrigintaquadringentillion 438 101317 Octotrigintaquadringentillion 439 101320 Noventrigintaquadringentillion 440 101323 Quadragintaquadringentillion 441 101326 Unquadragintaquadringentillion 442 101329 Duoquadragintaquadringentillion 443 101332 Tresquadragintaquadringentillion 444 101335 Quattuorquadragintaquadringentillion 445 101338 Quinquadragintaquadringentillion 446 101341 Sesquadragintaquadringentillion 447 101344 Septenquadragintaquadringentillion 448 101347 Octoquadragintaquadringentillion 449 101350 Novenquadragintaquadringentillion 450 101353 Quinquagintaquadringentillion 451 101356 Unquinquagintaquadringentillion 452 101359 Duoquinquagintaquadringentillion 453 101362 Tresquinquagintaquadringentillion 454 101365 Quattuorquinquagintaquadringentillion This number has the longest name in this list at 37 letters 455 101368 Quinquinquagintaquadringentillion 456 101371 Sesquinquagintaquadringentillion 457 101374 Septenquinquagintaquadringentillion 458 101377 Octoquinquagintaquadringentillion 459 101380 Novenquinquagintaquadringentillion 460 101383 Sexagintaquadringentillion 461 101386 Unsexagintaquadringentillion 462 101389 Duosexagintaquadringentillion 463 101392 Tresexagintaquadringentillion 464 101395 Quattuorsexagintaquadringentillion 465 101398 Quinsexagintaquadringentillion 466 101401 Sesexagintaquadringentillion 467 101404 Septensexagintaquadringentillion 468 101407 Octosexagintaquadringentillion 469 101410 Novensexagintaquadringentillion 470 101413 Septuagintaquadringentillion 471 101416 Unseptuagintaquadringentillion 472 101419 Duoseptuagintaquadringentillion 473 101422 Treseptuagintaquadringentillion 474 101425 Quattuorseptuagintaquadringentillion 475 101428 Quinseptuagintaquadringentillion 476 101431 Seseptuagintaquadringentillion 477 101434 Septenseptuagintaquadringentillion 478 101437 Octoseptuagintaquadringentillion 479 101440 Novenseptuagintaquadringentillion 480 101443 Octogintaquadringentillion 481 101446 Unoctogintaquadringentillion 482 101449 Duooctogintaquadringentillion 483 101452 Tresoctogintaquadringentillion 484 101455 Quattuoroctogintaquadringentillion 485 101458 Quinoctogintaquadringentillion 486 101461 Sexoctogintaquadringentillion 487 101464 Septemoctogintaquadringentillion 488 101467 Octooctogintaquadringentillion 489 101470 Novemoctogintaquadringentillion 490 101473 Nonagintaquadringentillion 491 101476 Unnonagintaquadringentillion 492 101479 Duononagintaquadringentillion 493 101482 Trenonagintaquadringentillion 494 101485 Quattuornonagintaquadringentillion 495 101488 Quinnonagintaquadringentillion 496 101491 Senonagintaquadringentillion 497 101494 Septenonagintaquadringentillion 498 101497 Octononagintaquadringentillion 499 101500 Novenonagintaquadringentillion 500 101503 Quingentillion 501 101506 Unquingentillion 502 101509 Duoquingentillion 503 101512 Tresquingentillion 504 101515 Quattuorquingentillion 505 101518 Quinquingentillion 506 101521 Sesquingentillion 507 101524 Septenquingentillion 508 101527 Octoquingentillion 509 101530 Novenquingentillion 510 101533 Deciquingentillion 511 101536 Undeciquingentillion 512 101539 Duodeciquingentillion 513 101542 Tredeciquingentillion 514 101545 Quattuordeciquingentillion 515 101548 Quindeciquingentillion 516 101551 Sedeciquingentillion 517 101554 Septendeciquingentillion 518 101557 Octodeciquingentillion 519 101560 Novendeciquingentillion 520 101563 Vigintiquingentillion 521 101566 Unvigintiquingentillion 522 101569 Duovigintiquingentillion 523 101572 Tresvigintiquingentillion 524 101575 Quattuorvigintiquingentillion 525 101578 Quinvigintiquingentillion 526 101581 Sesvigintiquingentillion 527 101584 Septemvigintiquingentillion 528 101587 Octovigintiquingentillion 529 101590 Novemvigintiquingentillion 530 101593 Trigintaquingentillion 531 101596 Untrigintaquingentillion 532 101599 Duotrigintaquingentillion 533 101602 Trestrigintaquingentillion 534 101605 Quattuortrigintaquingentillion 535 101608 Quintrigintaquingentillion 536 101611 Sestrigintaquingentillion 537 101614 Septentrigintaquingentillion 538 101617 Octotrigintaquingentillion 539 101620 Noventrigintaquingentillion 540 101623 Quadragintaquingentillion 541 101626 Unquadragintaquingentillion 542 101629 Duoquadragintaquingentillion 543 101632 Tresquadragintaquingentillion 544 101635 Quattuorquadragintaquingentillion 545 101638 Quinquadragintaquingentillion 546 101641 Sesquadragintaquingentillion 547 101644 Septenquadragintaquingentillion 548 101647 Octoquadragintaquingentillion 549 101650 Novenquadragintaquingentillion 550 101653 Quinquagintaquingentillion 551 101656 Unquinquagintaquingentillion 552 101659 Duoquinquagintaquingentillion 553 101662 Tresquinquagintaquingentillion 554 101665 Quattuorquinquagintaquingentillion 555 101668 Quinquinquagintaquingentillion 556 101671 Sesquinquagintaquingentillion 557 101674 Septenquinquagintaquingentillion 558 101677 Octoquinquagintaquingentillion 559 101680 Novenquinquagintaquingentillion 560 101683 Sexagintaquingentillion 561 101686 Unsexagintaquingentillion 562 101689 Duosexagintaquingentillion 563 101692 Tresexagintaquingentillion 564 101695 Quattuorsexagintaquingentillion 565 101698 Quinsexagintaquingentillion 566 101701 Sesexagintaquingentillion 567 101704 Septensexagintaquingentillion 568 101707 Octosexagintaquingentillion 569 101710 Novensexagintaquingentillion 570 101713 Septuagintaquingentillion 571 101716 Unseptuagintaquingentillion 572 101719 Duoseptuagintaquingentillion 573 101722 Treseptuagintaquingentillion 574 101725 Quattuorseptuagintaquingentillion 575 101728 Quinseptuagintaquingentillion 576 101731 Seseptuagintaquingentillion 577 101734 Septenseptuagintaquingentillion 578 101737 Octoseptuagintaquingentillion 579 101740 Novenseptuagintaquingentillion 580 101743 Octogintaquingentillion 581 101746 Unoctogintaquingentillion 582 101749 Duooctogintaquingentillion 583 101752 Tresoctogintaquingentillion 584 101755 Quattuoroctogintaquingentillion 585 101758 Quinoctogintaquingentillion 586 101761 Sexoctogintaquingentillion 587 101764 Septemoctogintaquingentillion 588 101767 Octooctogintaquingentillion 589 101770 Novemoctogintaquingentillion 590 101773 Nonagintaquingentillion 591 101776 Unnonagintaquingentillion 592 101779 Duononagintaquingentillion 593 101782 Trenonagintaquingentillion 594 101785 Quattuornonagintaquingentillion 595 101788 Quinnonagintaquingentillion 596 101791 Senonagintaquingentillion 597 101794 Septenonagintaquingentillion 598 101797 Octononagintaquingentillion 599 101800 Novenonagintaquingentillion 600 101803 Sescentillion 601 101806 Unsescentillion 602 101809 Duosescentillion 603 101812 Tresescentillion 604 101815 Quattuorsescentillion 605 101818 Quinsescentillion 606 101821 Sesescentillion 607 101824 Septensescentillion 608 101827 Octosescentillion 609 101830 Novensescentillion 610 101833 Decisescentillion 611 101836 Undecisescentillion 612 101839 Duodecisescentillion 613 101842 Tredecisescentillion 614 101845 Quattuordecisescentillion 615 101848 Quindecisescentillion 616 101851 Sedecisescentillion 617 101854 Septendecisescentillion 618 101857 Octodecisescentillion 619 101860 Novendecisescentillion 620 101863 Vigintisescentillion 621 101866 Unvigintisescentillion 622 101869 Duovigintisescentillion 623 101872 Tresvigintisescentillion 624 101875 Quattuorvigintisescentillion 625 101878 Quinvigintisescentillion 626 101881 Sesvigintisescentillion 627 101884 Septemvigintisescentillion 628 101887 Octovigintisescentillion 629 101890 Novemvigintisescentillion 630 101893 Trigintasescentillion 631 101896 Untrigintasescentillion 632 101899 Duotrigintasescentillion 633 101902 Trestrigintasescentillion 634 101905 Quattuortrigintasescentillion 635 101908 Quintrigintasescentillion 636 101911 Sestrigintasescentillion 637 101914 Septentrigintasescentillion 638 101917 Octotrigintasescentillion 639 101920 Noventrigintasescentillion 640 101923 Quadragintasescentillion 641 101926 Unquadragintasescentillion 642 101929 Duoquadragintasescentillion 643 101932 Tresquadragintasescentillion 644 101935 Quattuorquadragintasescentillion 645 101938 Quinquadragintasescentillion 646 101941 Sesquadragintasescentillion 647 101944 Septenquadragintasescentillion 648 101947 Octoquadragintasescentillion 649 101950 Novenquadragintasescentillion 650 101953 Quinquagintasescentillion 651 101956 Unquinquagintasescentillion 652 101959 Duoquinquagintasescentillion 653 101962 Tresquinquagintasescentillion 654 101965 Quattuorquinquagintasescentillion 655 101968 Quinquinquagintasescentillion 656 101971 Sesquinquagintasescentillion 657 101974 Septenquinquagintasescentillion 658 101977 Octoquinquagintasescentillion 659 101980 Novenquinquagintasescentillion 660 101983 Sexagintasescentillion 661 101986 Unsexagintasescentillion 662 101989 Duosexagintasescentillion 663 101992 Tresexagintasescentillion 664 101995 Quattuorsexagintasescentillion 665 101998 Quinsexagintasescentillion 666 102001 Sesexagintasescentillion 667 102004 Septensexagintasescentillion 668 102007 Octosexagintasescentillion 669 102010 Novensexagintasescentillion 670 102013 Septuagintasescentillion 671 102016 Unseptuagintasescentillion 672 102019 Duoseptuagintasescentillion 673 102022 Treseptuagintasescentillion 674 102025 Quattuorseptuagintasescentillion 675 102028 Quinseptuagintasescentillion 676 102031 Seseptuagintasescentillion 677 102034 Septenseptuagintasescentillion 678 102037 Octoseptuagintasescentillion 679 102040 Novenseptuagintasescentillion 680 102043 Octogintasescentillion 681 102046 Unoctogintasescentillion 682 102049 Duooctogintasescentillion 683 102052 Tresoctogintasescentillion 684 102055 Quattuoroctogintasescentillion 685 102058 Quinoctogintasescentillion 686 102061 Sexoctogintasescentillion 687 102064 Septemoctogintasescentillion 688 102067 Octooctogintasescentillion 689 102070 Novemoctogintasescentillion 690 102073 Nonagintasescentillion 691 102076 Unnonagintasescentillion 692 102079 Duononagintasescentillion 693 102082 Trenonagintasescentillion 694 102085 Quattuornonagintasescentillion 695 102088 Quinnonagintasescentillion 696 102091 Senonagintasescentillion 697 102094 Septenonagintasescentillion 698 102097 Octononagintasescentillion 699 102100 Novenonagintasescentillion 700 102103 Septingentillion 701 102106 Unseptingentillion 702 102109 Duoseptingentillion 703 102112 Treseptingentillion 704 102115 Quattuorseptingentillion 705 102118 Quinseptingentillion 706 102121 Seseptingentillion 707 102124 Septenseptingentillion 708 102127 Octoseptingentillion 709 102130 Novenseptingentillion 710 102133 Deciseptingentillion 711 102136 Undeciseptingentillion 712 102139 Duodeciseptingentillion 713 102142 Tredeciseptingentillion 714 102145 Quattuordeciseptingentillion 715 102148 Quindeciseptingentillion 716 102151 Sedeciseptingentillion 717 102154 Septendeciseptingentillion 718 102157 Octodeciseptingentillion 719 102160 Novendeciseptingentillion 720 102163 Vigintiseptingentillion 721 102166 Unvigintiseptingentillion 722 102169 Duovigintiseptingentillion 723 102172 Tresvigintiseptingentillion 724 102175 Quattuorvigintiseptingentillion 725 102178 Quinvigintiseptingentillion 726 102181 Sesvigintiseptingentillion 727 102184 Septemvigintiseptingentillion 728 102187 Octovigintiseptingentillion 729 102190 Novemvigintiseptingentillion 730 102193 Trigintaseptingentillion 731 102196 Untrigintaseptingentillion 732 102199 Duotrigintaseptingentillion 733 102202 Trestrigintaseptingentillion 734 102205 Quattuortrigintaseptingentillion 735 102208 Quintrigintaseptingentillion 736 102211 Sestrigintaseptingentillion 737 102214 Septentrigintaseptingentillion 738 102217 Octotrigintaseptingentillion 739 102220 Noventrigintaseptingentillion 740 102223 Quadragintaseptingentillion 741 102226 Unquadragintaseptingentillion 742 102229 Duoquadragintaseptingentillion 743 102232 Tresquadragintaseptingentillion 744 102235 Quattuorquadragintaseptingentillion 745 102238 Quinquadragintaseptingentillion 746 102241 Sesquadragintaseptingentillion 747 102244 Septenquadragintaseptingentillion 748 102247 Octoquadragintaseptingentillion 749 102250 Novenquadragintaseptingentillion 750 102253 Quinquagintaseptingentillion 751 102256 Unquinquagintaseptingentillion 752 102259 Duoquinquagintaseptingentillion 753 102262 Tresquinquagintaseptingentillion 754 102265 Quattuorquinquagintaseptingentillion 755 102268 Quinquinquagintaseptingentillion 756 102271 Sesquinquagintaseptingentillion 757 102274 Septenquinquagintaseptingentillion 758 102277 Octoquinquagintaseptingentillion 759 102280 Novenquinquagintaseptingentillion 760 102283 Sexagintaseptingentillion 761 102286 Unsexagintaseptingentillion 762 102289 Duosexagintaseptingentillion 763 102292 Tresexagintaseptingentillion 764 102295 Quattuorsexagintaseptingentillion 765 102298 Quinsexagintaseptingentillion 766 102301 Sesexagintaseptingentillion 767 102304 Septensexagintaseptingentillion 768 102307 Octosexagintaseptingentillion 769 102310 Novensexagintaseptingentillion 770 102313 Septuagintaseptingentillion 771 102316 Unseptuagintaseptingentillion 772 102319 Duoseptuagintaseptingentillion 773 102322 Treseptuagintaseptingentillion 774 102325 Quattuorseptuagintaseptingentillion 775 102328 Quinseptuagintaseptingentillion 776 102331 Seseptuagintaseptingentillion 777 102334 Septenseptuagintaseptingentillion 778 102337 Octoseptuagintaseptingentillion 779 102340 Novenseptuagintaseptingentillion 780 102343 Octogintaseptingentillion 781 102346 Unoctogintaseptingentillion 782 102349 Duooctogintaseptingentillion 783 102352 Tresoctogintaseptingentillion 784 102355 Quattuoroctogintaseptingentillion 785 102358 Quinoctogintaseptingentillion 786 102361 Sexoctogintaseptingentillion 787 102364 Septemoctogintaseptingentillion 788 102367 Octooctogintaseptingentillion 789 102370 Novemoctogintaseptingentillion 790 102373 Nonagintaseptingentillion 791 102376 Unnonagintaseptingentillion 792 102379 Duononagintaseptingentillion 793 102382 Trenonagintaseptingentillion 794 102385 Quattuornonagintaseptingentillion 795 102388 Quinnonagintaseptingentillion 796 102391 Senonagintaseptingentillion 797 102394 Septenonagintaseptingentillion 798 102397 Octononagintaseptingentillion 799 102400 Novenonagintaseptingentillion 800 102403 Octingentillion 801 102406 Unoctingentillion 802 102409 Duooctingentillion 803 102412 Tresoctingentillion 804 102415 Quattuoroctingentillion 805 102418 Quinoctingentillion 806 102421 Sexoctingentillion 807 102424 Septemoctingentillion 808 102427 Octooctingentillion 809 102430 Novemoctingentillion 810 102433 Decioctingentillion 811 102436 Undecioctingentillion 812 102439 Duodecioctingentillion 813 102442 Tredecioctingentillion 814 102445 Quattuordecioctingentillion 815 102448 Quindecioctingentillion 816 102451 Sedecioctingentillion 817 102454 Septendecioctingentillion 818 102457 Octodecioctingentillion 819 102460 Novendecioctingentillion 820 102463 Vigintioctingentillion 821 102466 Unvigintioctingentillion 822 102469 Duovigintioctingentillion 823 102472 Tresvigintioctingentillion 824 102475 Quattuorvigintioctingentillion 825 102478 Quinvigintioctingentillion 826 102481 Sesvigintioctingentillion 827 102484 Septemvigintioctingentillion 828 102487 Octovigintioctingentillion 829 102490 Novemvigintioctingentillion 830 102493 Trigintaoctingentillion 831 102496 Untrigintaoctingentillion 832 102499 Duotrigintaoctingentillion 833 102502 Trestrigintaoctingentillion 834 102505 Quattuortrigintaoctingentillion 835 102508 Quintrigintaoctingentillion 836 102511 Sestrigintaoctingentillion 837 102514 Septentrigintaoctingentillion 838 102517 Octotrigintaoctingentillion 839 102520 Noventrigintaoctingentillion 840 102523 Quadragintaoctingentillion 841 102526 Unquadragintaoctingentillion 842 102529 Duoquadragintaoctingentillion 843 102532 Tresquadragintaoctingentillion 844 102535 Quattuorquadragintaoctingentillion 845 102538 Quinquadragintaoctingentillion 846 102541 Sesquadragintaoctingentillion 847 102544 Septenquadragintaoctingentillion 848 102547 Octoquadragintaoctingentillion 849 102550 Novenquadragintaoctingentillion 850 102553 Quinquagintaoctingentillion 851 102556 Unquinquagintaoctingentillion 852 102559 Duoquinquagintaoctingentillion 853 102562 Tresquinquagintaoctingentillion 854 102565 Quattuorquinquagintaoctingentillion 855 102568 Quinquinquagintaoctingentillion 856 102571 Sesquinquagintaoctingentillion 857 102574 Septenquinquagintaoctingentillion 858 102577 Octoquinquagintaoctingentillion 859 102580 Novenquinquagintaoctingentillion 860 102583 Sexagintaoctingentillion 861 102586 Unsexagintaoctingentillion 862 102589 Duosexagintaoctingentillion 863 102592 Tresexagintaoctingentillion 864 102595 Quattuorsexagintaoctingentillion 865 102598 Quinsexagintaoctingentillion 866 102601 Sesexagintaoctingentillion 867 102604 Septensexagintaoctingentillion 868 102607 Octosexagintaoctingentillion 869 102610 Novensexagintaoctingentillion 870 102613 Septuagintaoctingentillion 871 102616 Unseptuagintaoctingentillion 872 102619 Duoseptuagintaoctingentillion 873 102622 Treseptuagintaoctingentillion 874 102625 Quattuorseptuagintaoctingentillion 875 102628 Quinseptuagintaoctingentillion 876 102631 Seseptuagintaoctingentillion 877 102634 Septenseptuagintaoctingentillion 878 102637 Octoseptuagintaoctingentillion 879 102640 Novenseptuagintaoctingentillion 880 102643 Octogintaoctingentillion 881 102646 Unoctogintaoctingentillion 882 102649 Duooctogintaoctingentillion 883 102652 Tresoctogintaoctingentillion 884 102655 Quattuoroctogintaoctingentillion 885 102658 Quinoctogintaoctingentillion 886 102661 Sexoctogintaoctingentillion 887 102664 Septemoctogintaoctingentillion 888 102667 Octooctogintaoctingentillion 889 102670 Novemoctogintaoctingentillion 890 102673 Nonagintaoctingentillion 891 102676 Unnonagintaoctingentillion 892 102679 Duononagintaoctingentillion 893 102682 Trenonagintaoctingentillion 894 102685 Quattuornonagintaoctingentillion 895 102688 Quinnonagintaoctingentillion 896 102691 Senonagintaoctingentillion 897 102694 Septenonagintaoctingentillion 898 102697 Octononagintaoctingentillion 899 102700 Novenonagintaoctingentillion 900 102703 Nongentillion 901 102706 Unnongentillion 902 102709 Duonongentillion 903 102712 Trenongentillion 904 102715 Quattuornongentillion 905 102718 Quinnongentillion 906 102721 Senongentillion 907 102724 Septenongentillion 908 102727 Octonongentillion 909 102730 Novenongentillion 910 102733 Decinongentillion 911 102736 Undecinongentillion 912 102739 Duodecinongentillion 913 102742 Tredecinongentillion 914 102745 Quattuordecinongentillion 915 102748 Quindecinongentillion 916 102751 Sedecinongentillion 917 102754 Septendecinongentillion 918 102757 Octodecinongentillion 919 102760 Novendecinongentillion 920 102763 Vigintinongentillion 921 102766 Unvigintinongentillion 922 102769 Duovigintinongentillion 923 102772 Tresvigintinongentillion 924 102775 Quattuorvigintinongentillion 925 102778 Quinvigintinongentillion 926 102781 Sesvigintinongentillion 927 102784 Septemvigintinongentillion 928 102787 Octovigintinongentillion 929 102790 Novemvigintinongentillion 930 102793 Trigintanongentillion 931 102796 Untrigintanongentillion 932 102799 Duotrigintanongentillion 933 102802 Trestrigintanongentillion 934 102805 Quattuortrigintanongentillion 935 102808 Quintrigintanongentillion 936 102811 Sestrigintanongentillion 937 102814 Septentrigintanongentillion 938 102817 Octotrigintanongentillion 939 102820 Noventrigintanongentillion 940 102823 Quadragintanongentillion 941 102826 Unquadragintanongentillion 942 102829 Duoquadragintanongentillion 943 102832 Tresquadragintanongentillion 944 102835 Quattuorquadragintanongentillion 945 102838 Quinquadragintanongentillion 946 102841 Sesquadragintanongentillion 947 102844 Septenquadragintanongentillion 948 102847 Octoquadragintanongentillion 949 102850 Novenquadragintanongentillion 950 102853 Quinquagintanongentillion 951 102856 Unquinquagintanongentillion 952 102859 Duoquinquagintanongentillion 953 102862 Tresquinquagintanongentillion 954 102865 Quattuorquinquagintanongentillion 955 102868 Quinquinquagintanongentillion 956 102871 Sesquinquagintanongentillion 957 102874 Septenquinquagintanongentillion 958 102877 Octoquinquagintanongentillion 959 102880 Novenquinquagintanongentillion 960 102883 Sexagintanongentillion 961 102886 Unsexagintanongentillion 962 102889 Duosexagintanongentillion 963 102892 Tresexagintanongentillion 964 102895 Quattuorsexagintanongentillion 965 102898 Quinsexagintanongentillion 966 102901 Sesexagintanongentillion 967 102904 Septensexagintanongentillion 968 102907 Octosexagintanongentillion 969 102910 Novensexagintanongentillion 970 102913 Septuagintanongentillion 971 102916 Unseptuagintanongentillion 972 102919 Duoseptuagintanongentillion 973 102922 Treseptuagintanongentillion 974 102925 Quattuorseptuagintanongentillion 975 102928 Quinseptuagintanongentillion 976 102931 Seseptuagintanongentillion 977 102934 Septenseptuagintanongentillion 978 102937 Octoseptuagintanongentillion 979 102940 Novenseptuagintanongentillion 980 102943 Octogintanongentillion 981 102946 Unoctogintanongentillion 982 102949 Duooctogintanongentillion 983 102952 Tresoctogintanongentillion 984 102955 Quattuoroctogintanongentillion 985 102958 Quinoctogintanongentillion 986 102961 Sexoctogintanongentillion 987 102964 Septemoctogintanongentillion 988 102967 Octooctogintanongentillion 989 102970 Novemoctogintanongentillion 990 102973 Nonagintanongentillion 991 102976 Unnonagintanongentillion 992 102979 Duononagintanongentillion 993 102982 Trenonagintanongentillion 994 102985 Quattuornonagintanongentillion 995 102988 Quinnonagintanongentillion 996 102991 Senonagintanongentillion 997 102994 Septenonagintanongentillion 998 102997 Octononagintanongentillion 999 103000 Novenonagintanongentillion 1000 103003 Millinillion / Millillion I've seen both names used for this number; not sure which is preferred 1001 103006 Millimillion 1002 103009 Millibillion 1003 103012 Millitrillion ... ... ...and so on, and so on...