81990307086080

Names of 81990307086080

• Cardinal: 81990307086080 can be written as Eighty-one trillion, nine hundred ninety billion, three hundred seven million, eighty-six thousand and eighty.

Scientific notation

• Scientific notation: 8.199030708608 × 10¹³

Factors of 81990307086080

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 1930

Divisors of 81990307086080

• Number of divisors d(n): 324
• Complete list of divisors:
  1 2 4 5 8 10 16 19 20 31 32 38 40 62 64 76 80 95 124 128 152 155 160 190 248 256 304 310 320 380 496 589 608 620 640 760 961 992 1178 1216 1240 1280 1520 1873 1922 1984 2356 2432 2480 2945 3040 3746 3844 3968 4712 4805 4864 4960 5890 6080 7492 7688 7936 9365 9424 9610 9920 11780 12160 14984 15376 18259 18730 18848 19220 19840 23560 24320 29968 30752 35587 36518 37460 37696 38440 39680 47120 58063 59936 61504 71174 73036 74920 75392 76880 91295 94240 116126 119872 123008 142348 146072 149840 150784 153760 177935 182590 188480 232252 239744 246016 284696 290315 292144 299680 307520 355870 365180 376960 464504 479488 569392 580630 584288 599360 615040 711740 730360 753920 929008 1103197 1138784 1161260 1168576 1198720 1230080 1423480 1460720 1799953 1858016 2206394 2277568 2322520 2337152 2397440 2846960 2921440 3508129 3599906 3716032 4412788 4555136 4645040 4674304 5515985 5693920 5842880 7016258 7199812 7432064 8825576 8999765 9110272 9290080 11031970 11387840 11685760 14032516 14399624 14864128 17540645 17651152 17999530 18580160 22063940 22775680 23371520 28065032 28799248 34199107 35081290 35302304 35999060 37160320 44127880 45551360 56130064 57598496 66654451 68398214 70162580 70604608 71998120 74320640 88255760 108751999 112260128 115196992 133308902 136796428 140325160 141209216 143996240 170995535 176511520 217503998 224520256 230393984 266617804 273592856 280650320 282418432 287992480 333272255 341991070 353023040 435007996 449040512 460787968 533235608 543759995 547185712 561300640 575984960 666544510 683982140 706046080 870015992 898081024 1066471216 1087519990 1094371424 1122601280 1151969920 1333089020 1367964280 1412092160 1740031984 2066287981 2132942432 2175039980 2188742848 2245202560 2303939840 2666178040 2735928560 3371311969 3480063968 4132575962 4265884864 4350079960 4377485696 4490405120 5332356080 5471857120 6742623938 6960127936 8265151924 8531769728 8700159920 8754971392 10331439905 10664712160 10943714240 13485247876 13920255872 16530303848 16856559845 17063539456 17400319840 20662879810 21329424320 21887428480 26970495752 27840511744 33060607696 33713119690 34800639680 41325759620 42658848640 43774856960 53940991504 64054927411 66121215392 67426239380 69601279360 82651519240 85317697280 107881983008 128109854822 132242430784 134852478760 139202558720 165303038480 215763966016 256219709644 264484861568 269704957520 320274637055 330606076960 431527932032 512439419288 528969723136 539409915040 640549274110 661212153920 863055864064 1024878838576 1078819830080 1281098548220 1322424307840 2049757677152 2157639660160 2562197096440 2644848615680 4099515354304 4315279320320 5124394192880 8199030708608 10248788385760 16398061417216 20497576771520 40995153543040 81990307086080
• Sum of all divisors σ(n): 213726750272280
• Sum of proper divisors (its aliquot sum) s(n): 131736443186200
• 81990307086080 is an abundant number, because the sum of its proper divisors (131736443186200) is greater than itself. Its abundance is 49746136100120

Bases of 81990307086080

• Binary: 10010101001000111011011001000001111111100000000₂
• Hexadecimal: 0x4A91DB20FF00
• Base-36: T29TRWU0W

Squares and roots of 81990307086080

• 81990307086080 squared (81990307086080²) is 6722410456069700260529766400
• 81990307086080 cubed (81990307086080³) is 551172497651829829817295328200687091712000
• The square root of 81990307086080 is 9054849.9206822859
• The cube root of 81990307086080 is 43443.1029737663

Scales and comparisons

• 81,990,307,086,080 seconds is equal to 2,607,038 years, 7 weeks, 6 days, 13 hours, 41 minutes, 20 seconds.
• To count from 1 to 81,990,307,086,080 would take you about six million, five hundred seventeen thousand, five hundred ninety-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 81990307086080 cubic inches would be around 3620.3 feet tall.

Recreational maths with 81990307086080

• 81990307086080 backwards is 08068070309918
• The number of decimal digits it has is: 14
• The sum of 81990307086080's digits is 59
• More coming soon!