81365439464320

Names of 81365439464320

• Cardinal: 81365439464320 can be written as Eighty-one trillion, three hundred sixty-five billion, four hundred thirty-nine million, four hundred sixty-four thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.136543946432 × 10¹³

Factors of 81365439464320

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 20533

Divisors of 81365439464320

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 32 40 44 55 64 80 88 110 128 160 176 181 220 320 352 362 440 640 704 724 880 905 1408 1448 1760 1810 1991 2896 3520 3620 3881 3982 5792 7040 7240 7762 7964 9955 11584 14480 15524 15928 16453 19405 19910 23168 28960 31048 31856 32906 38810 39820 42691 57920 62096 63712 65812 77620 79640 82265 85382 115840 124192 127424 131624 155240 159280 164530 170764 180983 213455 248384 254848 263248 310480 318560 329060 341528 361966 426910 496768 526496 620960 637120 658120 683056 702461 723932 853820 904915 1052992 1241920 1274240 1316240 1366112 1404922 1447864 1707640 1809830 2105984 2483840 2632480 2732224 2809844 2895728 2977993 3415280 3512305 3619660 5264960 5464448 5619688 5791456 5955986 6830560 7024610 7239320 7727071 10529920 11239376 11582912 11911972 13661120 14049220 14478640 14889965 15454142 22478752 23165824 23823944 27322240 28098440 28957280 29779930 30908284 32757923 38635355 44957504 47647888 56196880 57914560 59559860 61816568 63854093 65515846 77270710 89915008 95295776 112393760 115829120 119119720 123633136 127708186 131031692 154541420 163789615 190591552 224787520 238239440 247266272 255416372 262063384 309082840 319270465 327579230 381183104 449575040 476478880 494532544 510832744 524126768 618165680 638540930 655158460 702395023 952957760 989065088 1021665488 1048253536 1236331360 1277081860 1310316920 1404790046 1905915520 2043330976 2096507072 2472662720 2554163720 2620633840 2809580092 3511975115 4086661952 4193014144 4945325440 5108327440 5241267680 5619160184 7023950230 8173323904 10216654880 10482535360 11238320368 11557590833 14047900460 20433309760 20965070720 22476640736 23115181666 28095800920 40866619520 44953281472 46230363332 56191601840 57787954165 89906562944 92460726664 112383203680 115575908330 127133499163 184921453328 224766407360 231151816660 254266998326 369842906656 449532814720 462303633320 508533996652 635667495815 739685813312 924607266640 1017067993304 1271334991630 1479371626624 1849214533280 2034135986608 2542669983260 3698429066560 4068271973216 5085339966520 7396858133120 8136543946432 10170679933040 16273087892864 20341359866080 40682719732160 81365439464320
• Sum of all divisors σ(n): 213437678650560
• Sum of proper divisors (its aliquot sum) s(n): 132072239186240
• 81365439464320 is an abundant number, because the sum of its proper divisors (132072239186240) is greater than itself. Its abundance is 50706799721920

Bases of 81365439464320

• Binary: 10010100000000001011110000111011100001110000000₂
• Hexadecimal: 0x4A005E1DC380
• Base-36: SUARLV3B4

Squares and roots of 81365439464320

• 81365439464320 squared (81365439464320²) is 6620334739221922488553062400
• 81365439464320 cubed (81365439464320³) is 538666445457696067820615446855351533568000
• The square root of 81365439464320 is 9020279.3451378211
• The cube root of 81365439464320 is 43332.4580068857

Scales and comparisons

• 81,365,439,464,320 seconds is equal to 2,587,169 years, 15 weeks, 2 days, 10 hours, 18 minutes, 40 seconds.
• To count from 1 to 81,365,439,464,320 would take you about six million, four hundred sixty-seven thousand, nine hundred twenty-three 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 81365439464320 cubic inches would be around 3611 feet tall.

Recreational maths with 81365439464320

• 81365439464320 backwards is 02346493456318
• The number of decimal digits it has is: 14
• The sum of 81365439464320's digits is 58
• More coming soon!