81329890123659008

Names of 81329890123659008

• Cardinal: 81329890123659008 can be written as Eighty-one quadrillion, three hundred twenty-nine trillion, eight hundred ninety billion, one hundred twenty-three million, six hundred fifty-nine thousand and eight.

Scientific notation

• Scientific notation: 8.1329890123659008 × 10¹⁶

Factors of 81329890123659008

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 237325111

Divisors of 81329890123659008

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 4 8 13 16 26 32 52 64 89 104 128 169 178 208 256 338 356 416 676 712 832 1157 1352 1424 1664 2314 2704 2848 3328 4628 5408 5696 7921 9256 10816 11392 15041 15842 18512 21632 22784 30082 31684 37024 43264 60164 63368 74048 102973 120328 126736 148096 205946 240656 253472 296192 411892 481312 506944 823784 962624 1013888 1338649 1647568 1925248 2027776 2677298 3295136 3850496 5354596 6590272 10709192 13180544 21418384 26361088 42836768 85673536 171347072 237325007 342694144 474650014 949300028 1898600056 3085225091 3797200112 6170450182 7594400224 12340900364 15188800448 21121925623 24681800728 30377600896 40107926183 42243851246 49363601456 60755201792 80215852366 84487702492 98727202912 160431704732 168975404984 197454405824 274585033099 320863409464 337950809968 394908811648 549170066198 641726818928 675901619936 789817623296 1098340132396 1283453637856 1351803239872 1879851380447 2196680264792 2566907275712 2703606479744 3569605430287 3759702760894 4393360529584 5133814551424 5407212959488 7139210860574 7519405521788 8786721059168 10267629102848 14278421721148 15038811043576 17573442118336 24438067945811 28556843442296 30077622087152 35146884236672 48876135891622 57113686884592 60155244174304 70293768473344 97752271783244 114227373769184 120310488348608 195504543566488 228454747538368 240620976697216 317694883295543 391009087132976 456909495076736 481241953394432 635389766591086 782018174265952 913818990153472 1270779533182172 1564036348531904 2541559066364344 3128072697063808 5083118132728688 6256145394127616 10166236265457376 20332472530914752 40664945061829504 81329890123659008
• Sum of all divisors σ(n): 177787910493036144
• Sum of proper divisors (its aliquot sum) s(n): 96458020369377136
• 81329890123659008 is an abundant number, because the sum of its proper divisors (96458020369377136) is greater than itself. Its abundance is 15128130245718128

Bases of 81329890123659008

• Binary: 100100000111100010001101010101010011100010011011100000000₂
• Hexadecimal: 0x120F11AAA713700
• Base-36: M8T1FQ83ABK

Squares and roots of 81329890123659008

• 81329890123659008 squared (81329890123659008²) is 6614551027526447051589790259544064
• 81329890123659008 cubed (81329890123659008³) is 537960708286061729225923103095908461696241486528512
• The square root of 81329890123659008 is 285183958.3911742537
• The cube root of 81329890123659008 is 433261.4629878469

Scales and comparisons

• 81,329,890,123,659,008 seconds is equal to 2,586,038,936 years, 3 weeks, 2 days, 12 hours, 50 minutes, 8 seconds.
• To count from 1 to 81,329,890,123,659,008 would take you about seven billion, seven hundred fifty-eight million, one hundred sixteen thousand, eight hundred eight 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 81329890123659008 cubic inches would be around 36105.1 feet tall.

Recreational maths with 81329890123659008

• 81329890123659008 backwards is 80095632109892318
• The number of decimal digits it has is: 17
• The sum of 81329890123659008's digits is 74
• More coming soon!