81168721618480

Names of 81168721618480

• Cardinal: 81168721618480 can be written as Eighty-one trillion, one hundred sixty-eight billion, seven hundred twenty-one million, six hundred eighteen thousand, four hundred eighty.

Scientific notation

• Scientific notation: 8.116872161848 × 10¹³

Factors of 81168721618480

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 2155

Divisors of 81168721618480

• Number of divisors d(n): 640
• Complete list of divisors:
  1 2 4 5 8 10 16 17 19 20 29 34 38 40 58 68 76 80 85 95 113 116 136 145 152 170 190 226 232 272 290 304 323 340 380 452 464 493 551 565 580 646 680 760 877 904 986 1093 1102 1130 1160 1292 1360 1520 1615 1754 1808 1921 1972 2147 2186 2204 2260 2320 2465 2584 2755 3230 3277 3508 3842 3944 4294 4372 4385 4408 4520 4930 5168 5465 5510 6460 6554 7016 7684 7888 8588 8744 8770 8816 9040 9367 9605 9860 10735 10930 11020 12920 13108 14032 14909 15368 16385 16663 17176 17488 17540 18581 18734 19210 19720 20767 21470 21860 22040 25433 25840 26216 29818 30736 31697 32770 33326 34352 35080 36499 37162 37468 38420 39440 41534 42940 43720 44080 46835 50866 52432 55709 59636 62263 63394 65540 66652 70160 72998 74324 74545 74936 76840 83068 83315 85880 87440 92905 93670 99101 101732 103835 111418 119272 123509 124526 126788 127165 131080 133304 145996 148648 149090 149872 153680 158485 166136 166630 171760 182495 185810 187340 198202 203464 207670 222836 238544 247018 249052 253576 254330 262160 266608 278545 283271 291992 297296 298180 311315 316970 332272 333260 353039 364990 371620 374680 396404 406928 415340 432361 445672 483227 494036 495505 498104 507152 508660 538849 557090 566542 583984 596360 602243 617545 622630 633940 666520 706078 729980 743240 749360 792808 830680 864722 891344 958561 966454 988072 991010 996208 1017320 1058471 1077698 1114180 1133084 1192720 1204486 1235090 1245260 1267880 1333040 1412156 1416355 1459960 1486480 1585616 1661360 1684717 1729444 1765195 1882919 1917122 1932908 1976144 1982020 2034640 2099653 2116942 2155396 2161805 2228360 2266168 2346671 2408972 2416135 2470180 2490520 2535760 2694245 2824312 2832710 2873929 2919920 3011215 3369434 3458888 3530390 3581761 3765838 3834244 3865816 3964040 4199306 4233884 4310792 4323610 4456720 4532336 4693342 4792805 4817944 4832270 4940360 4981040 5292355 5388490 5648624 5665420 5747858 6022430 6738868 6917776 7060780 7163522 7531676 7668488 7731632 7928080 8214859 8398612 8423585 8467768 8621584 8647220 9386684 9414595 9585610 9635888 9664540 9880720 10238131 10498265 10584710 10776980 11330840 11495716 11733355 12044860 13477736 14121560 14327044 14369645 15063352 15336976 16295537 16429718 16797224 16847170 16935536 17294440 17908805 18212659 18773368 18829190 19171220 19329080 20476262 20996530 21169420 21553960 22661680 22991432 23466710 24089720 26955472 27798269 28243120 28654088 28739290 30126704 32009623 32591074 32859436 33594448 33694340 34588880 35817610 36425318 37546736 37658380 38342440 38658160 39893407 40952524 41074295 41993060 42338840 43107920 45982864 46933420 48179440 48856793 51190655 54604651 55596538 57308176 57478580 60889937 64019246 65182148 65718872 67388680 68053459 71635220 72850636 75316760 76684880 79786814 81477685 81905048 82148590 83986120 84677680 91063295 93866840 97713586 102381310 108317393 109209302 111193076 114957160 121779874 128038492 130364296 131437744 134777360 136106918 138991345 143270440 145701272 150633520 159573628 160048115 162955370 163810096 164297180 167972240 182126590 187733680 195427172 199467035 204762620 216634786 218418604 222386152 229914320 243559748 244283965 256076984 260728592 272213836 273023255 277982690 286540880 291402544 304449685 309615203 319147256 320096230 325910740 328594360 340267295 364253180 390854344 398934070 409525240 433269572 436837208 444772304 472570573 487119496 488567930 512153968 528167111 541586965 544427672 546046510 555965380 608899370 619230406 638294512 640192460 651821480 657188720 680534590 728506360 781708688 797868140 819050480 866539144 873674416 928279067 945141146 974238992 977135860 1056334222 1083173930 1088855344 1092093020 1111930760 1156908803 1217798740 1238460812 1280384920 1303642960 1361069180 1457012720 1548076015 1595736280 1733078288 1841395681 1856558134 1890282292 1954271720 2058030467 2112668444 2166347860 2184186040 2223861520 2313817606 2362852865 2435597480 2476921624 2560769840 2640835555 2722138360 3096152030 3141204397 3191472560 3682791362 3713116268 3780564584 3908543440 4116060934 4225336888 4332695720 4368372080 4627635212 4641395335 4725705730 4871194960 4953843248 5281671110 5444276720 5784544015 6192304060 6282408794 7365582724 7426232536 7561129168 8232121868 8450673776 8665391440 8978840887 9206978405 9255270424 9282790670 9451411460 10290152335 10563342220 11569088030 12384608120 12564817588 14731165448 14852465072 15706021985 16464243736 17957681774 18413956810 18510540848 18565581340 18902822920 20580304670 21126684440 23138176060 24769216240 25129635176 29462330896 31412043970 32928487472 34986517939 35915363548 36827913620 37131162680 37805645840 41160609340 42253368880 44894204435 46276352120 50259270352 53400474749 59682883543 62824087940 69973035878 71830727096 73655827240 74262325360 82321218680 89788408870 92552704240 106800949498 119365767086 125648175880 139946071756 143661454192 147311654480 164642437360 174932589695 179576817740 213601898996 238731534172 251296351760 267002373745 279892143512 298414417715 349865179390 359153635480 427203797992 477463068344 534004747490 559784287024 596828835430 699730358780 718307270960 854407595984 954926136688 1014609020231 1068009494980 1193657670860 1399460717560 2029218040462 2136018989960 2387315341720 2798921435120 4058436080924 4272037979920 4774630683440 5073045101155 8116872161848 10146090202310 16233744323696 20292180404620 40584360809240 81168721618480
• Sum of all divisors σ(n): 219964901702400
• Sum of proper divisors (its aliquot sum) s(n): 138796180083920
• 81168721618480 is an abundant number, because the sum of its proper divisors (138796180083920) is greater than itself. Its abundance is 57627458465440

Bases of 81168721618480

• Binary: 10010011101001010010000110100011010011000110000₂
• Hexadecimal: 0x49D290D1A630
• Base-36: SRSE94Y0G

Squares and roots of 81168721618480

• 81168721618480 squared (81168721618480²) is 6588361369178302510677510400
• 81168721618480 cubed (81168721618480³) is 534768869896781375352178899436025032192000
• The square root of 81168721618480 is 9009368.5471557885
• The cube root of 81168721618480 is 43297.5080870281

Scales and comparisons

• 81,168,721,618,480 seconds is equal to 2,580,914 years, 14 weeks, 2 days, 12 hours, 14 minutes, 40 seconds.
• To count from 1 to 81,168,721,618,480 would take you about six million, four hundred fifty-two thousand, two hundred eighty-five years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81168721618480 cubic inches would be around 3608.1 feet tall.

Recreational maths with 81168721618480

• 81168721618480 backwards is 08481612786118
• The number of decimal digits it has is: 14
• The sum of 81168721618480's digits is 61
• More coming soon!