81356989497840

Names of 81356989497840

• Cardinal: 81356989497840 can be written as Eighty-one trillion, three hundred fifty-six billion, nine hundred eighty-nine million, four hundred ninety-seven thousand, eight hundred forty.

Scientific notation

• Scientific notation: 8.135698949784 × 10¹³

Factors of 81356989497840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 23639

Divisors of 81356989497840

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 29 30 35 36 40 42 45 48 56 58 60 63 70 72 80 84 87 90 105 112 116 120 126 140 144 145 168 174 180 203 210 232 240 252 261 280 290 315 336 348 360 406 420 435 464 504 522 560 580 609 630 696 720 812 840 870 1008 1015 1044 1160 1218 1260 1305 1392 1624 1680 1740 1827 2030 2088 2320 2436 2520 2610 3045 3248 3480 3654 4060 4176 4872 5040 5220 6090 6960 7308 8120 9135 9744 10440 12180 14616 16240 18270 20880 23593 24360 29232 36540 47186 48720 70779 73080 94372 117965 141558 146160 165151 188744 212337 235930 283116 330302 353895 377488 424674 471860 495453 566232 660604 684197 707790 825755 849348 943720 990906 1061685 1132464 1321208 1368394 1415580 1486359 1651510 1698696 1887440 1981812 2052591 2123370 2477265 2642416 2736788 2831160 2972718 3303020 3397392 3420985 3963624 4105182 4246740 4789379 4954530 5473576 5662320 5945436 6157773 6606040 6841970 7431795 7927248 8210364 8493480 9578758 9909060 10262955 10947152 11890872 12315546 13212080 13683940 14368137 14863590 16420728 16986960 19157516 19818120 20525910 23781744 23946895 24631092 27367880 28736274 29727180 30788865 32841456 38315032 39636240 41051820 43104411 47893790 49262184 54735760 57472548 59454360 61577730 71840685 76630064 82103640 86208822 95787580 98524368 114945096 118908720 123155460 143681370 164207280 172417644 191575160 215522055 229890192 246310920 287362740 344835288 383150320 431044110 492621840 556629649 574725480 689670576 862088220 1113259298 1149450960 1669888947 1724176440 2226518596 2783148245 3339777894 3448352880 3896407543 4453037192 5009666841 5566296490 6679555788 7792815086 8349444735 8906074384 10019333682 11132592980 11689222629 13359111576 15585630172 16142259821 16698889470 19482037715 20038667364 22265185960 23378445258 25048334205 26718223152 31171260344 32284519642 33397778940 35067667887 38964075430 40077334728 44530371920 46756890516 48426779463 50096668410 58446113145 62342520688 64569039284 66795557880 70135335774 77928150860 80154669456 80711299105 93513781032 96853558926 100193336820 112995818747 116892226290 129138078568 133591115760 140270671548 145280338389 155856301720 161422598210 175338339435 187027562064 193707117852 200386673640 225991637494 233784452580 242133897315 258276157136 280541343096 290560676778 311712603440 322845196420 338987456241 350676678870 387414235704 400773347280 451983274988 467568905160 484267794630 561082686192 564979093735 581121353556 645690392840 677974912482 701353357740 726401691945 774828471408 903966549976 935137810320 968535589260 1016962368723 1129958187470 1162242707112 1291380785680 1355949824964 1402706715480 1452803383890 1694937281205 1807933099952 1937071178520 2033924737446 2259916374940 2324485414224 2711899649928 2805413430960 2905606767780 3389874562410 3874142357040 4067849474892 4519832749880 5084811843615 5423799299856 5811213535560 6779749124820 8135698949784 9039665499760 10169623687230 11622427071120 13559498249640 16271397899568 20339247374460 27118996499280 40678494748920 81356989497840
• Sum of all divisors σ(n): 323037009977760
• Sum of proper divisors (its aliquot sum) s(n): 241680020479920
• 81356989497840 is an abundant number, because the sum of its proper divisors (241680020479920) is greater than itself. Its abundance is 160323030982080

Bases of 81356989497840

• Binary: 10010011111111001100110011101011000000111110000₂
• Hexadecimal: 0x49FE667581F0
• Base-36: SU6VUYZG0

Squares and roots of 81356989497840

• 81356989497840 squared (81356989497840²) is 6618959740151648055364665600
• 81356989497840 cubed (81356989497840³) is 538498638066143406209270958090623522304000
• The square root of 81356989497840 is 9019810.9457925999
• The cube root of 81356989497840 is 43330.9579003039

Scales and comparisons

• 81,356,989,497,840 seconds is equal to 2,586,900 years, 31 weeks, 5 days, 21 hours, 24 minutes.
• To count from 1 to 81,356,989,497,840 would take you about six million, four hundred sixty-seven thousand, two hundred fifty-one 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 81356989497840 cubic inches would be around 3610.9 feet tall.

Recreational maths with 81356989497840

• 81356989497840 backwards is 04879498965318
• The number of decimal digits it has is: 14
• The sum of 81356989497840's digits is 81
• More coming soon!