81317170989920

Names of 81317170989920

• Cardinal: 81317170989920 can be written as Eighty-one trillion, three hundred seventeen billion, one hundred seventy million, nine hundred eighty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.131717098992 × 10¹³

Factors of 81317170989920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 5817

Divisors of 81317170989920

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 80 127 160 254 508 635 941 1016 1201 1270 1882 2032 2402 2540 3541 3764 4064 4705 4804 5080 6005 7082 7528 9410 9608 10160 12010 14164 15056 17705 18820 19216 20320 24020 28328 30112 35410 37640 38432 48040 56656 70820 75280 96080 113312 119507 141640 150560 152527 192160 239014 283280 305054 449707 478028 566560 597535 610108 762635 899414 956056 1130141 1195070 1220216 1525270 1798828 1912112 2248535 2260282 2390140 2440432 3050540 3332081 3597656 3824224 4252741 4497070 4520564 4780280 4880864 5650705 6101080 6664162 7195312 8505482 8994140 9041128 9560560 11301410 12202160 13328324 14390624 16660405 17010964 17988280 18082256 19121120 21263705 22602820 24404320 26656648 33320810 34021928 35976560 36164512 42527410 45205640 53313296 66641620 68043856 71953120 85054820 90411280 106626592 133283240 136087712 143527907 170109640 180822560 266566480 287055814 340219280 423174287 533132960 540098107 574111628 680438560 717639535 846348574 1080196214 1148223256 1435279070 1692697148 2115871435 2160392428 2296446512 2700490535 2870558140 3385394296 4001829281 4231742870 4320784856 4592893024 5400981070 5741116280 6770788592 8003658562 8463485740 8641569712 10801962140 11482232560 13541577184 16007317124 16926971480 17283139424 20009146405 21603924280 22964465120 32014634248 33853942960 40018292810 43207848560 64029268496 67707885920 80036585620 86415697120 128058536992 160073171240 320146342480 508232318687 640292684960 1016464637374 2032929274748 2541161593435 4065858549496 5082323186870 8131717098992 10164646373740 16263434197984 20329292747480 40658585494960 81317170989920
• Sum of all divisors σ(n): 194046447716352
• Sum of proper divisors (its aliquot sum) s(n): 112729276726432
• 81317170989920 is an abundant number, because the sum of its proper divisors (112729276726432) is greater than itself. Its abundance is 31412105736512

Bases of 81317170989920

• Binary: 10010011111010100100001000101110100101101100000₂
• Hexadecimal: 0x49F521174B60
• Base-36: STOLC263K

Squares and roots of 81317170989920

• 81317170989920 squared (81317170989920²) is 6612482297803886832741606400
• 81317170989920 cubed (81317170989920³) is 537708353678337768480834427169459007488000
• The square root of 81317170989920 is 9017603.3950224269
• The cube root of 81317170989920 is 43323.8875975123

Scales and comparisons

• 81,317,170,989,920 seconds is equal to 2,585,634 years, 26 weeks, 2 days, 12 hours, 45 minutes, 20 seconds.
• To count from 1 to 81,317,170,989,920 would take you about six million, four hundred sixty-four thousand and eighty-six 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 81317170989920 cubic inches would be around 3610.3 feet tall.

Recreational maths with 81317170989920

• 81317170989920 backwards is 02998907171318
• The number of decimal digits it has is: 14
• The sum of 81317170989920's digits is 65
• More coming soon!