81440859383166208

Names of 81440859383166208

• Cardinal: 81440859383166208 can be written as Eighty-one quadrillion, four hundred forty trillion, eight hundred fifty-nine billion, three hundred eighty-three million, one hundred sixty-six thousand, two hundred eight.

Scientific notation

• Scientific notation: 8.1440859383166208 × 10¹⁶

Factors of 81440859383166208

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 406

Divisors of 81440859383166208

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 4 8 16 31 32 62 64 124 128 248 256 373 496 746 961 992 1492 1922 1984 2984 3844 3968 5968 7688 7936 11563 11936 15376 23126 23872 29791 30752 46252 47744 59582 61504 92504 95488 119164 123008 185008 238328 246016 358453 370016 476656 716906 740032 923521 953312 1433812 1480064 1847042 1906624 2867624 2960128 3694084 3813248 5735248 7388168 7626496 11112043 11470496 14776336 22224086 22940992 28629151 29552672 44448172 45881984 57258302 59105344 88896344 91763968 114516604 118210688 177792688 229033208 236421376 344473333 355585376 458066416 688946666 711170752 887503681 916132832 1377893332 1422341504 1775007362 1832265664 2755786664 2844683008 3550014724 3664531328 5511573328 7100029448 7329062656 10678673323 11023146656 14200058896 21357346646 22046293312 27512614111 28400117792 42714693292 44092586624 55025228222 56800235584 85429386584 88185173248 110050456444 113600471168 170858773168 220100912888 227200942336 331038873013 341717546336 440201825776 662077746026 683435092672 852891037441 880403651552 1324155492052 1366870185344 1705782074882 1760807303104 2648310984104 2733740370688 3411564149764 3521614606208 5296621968208 6823128299528 7043229212416 10262205063403 10593243936416 13646256599056 20524410126806 21186487872832 27292513198112 41048820253612 42372975745664 54585026396224 82097640507224 84745951491328 109170052792448 164195281014448 218340105584896 318128356965493 328390562028896 636256713930986 656781124057792 1272513427861972 1313562248115584 2545026855723944 2627124496231168 5090053711447888 10180107422895776 20360214845791552 40720429691583104 81440859383166208
• Sum of all divisors σ(n): 168432731653809546
• Sum of proper divisors (its aliquot sum) s(n): 86991872270643338
• 81440859383166208 is an abundant number, because the sum of its proper divisors (86991872270643338) is greater than itself. Its abundance is 5551012887477130

Bases of 81440859383166208

• Binary: 100100001010101100000011110110101101111000111010100000000₂
• Hexadecimal: 0x1215607B5BC7500
• Base-36: M9WDIAW26F4

Squares and roots of 81440859383166208

• 81440859383166208 squared (81440859383166208²) is 6632613577068651385401686953099264
• 81440859383166208 cubed (81440859383166208³) is 540165749672927064253364352527807719049894834470912
• The square root of 81440859383166208 is 285378449.4021337415
• The cube root of 81440859383166208 is 433458.4256439719

Scales and comparisons

• 81,440,859,383,166,208 seconds is equal to 2,589,567,415 years, 13 weeks, 6 days, 23 minutes, 28 seconds.
• To count from 1 to 81,440,859,383,166,208 would take you about seven billion, seven hundred sixty-eight million, seven hundred two thousand, two hundred forty-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 81440859383166208 cubic inches would be around 36121.5 feet tall.

Recreational maths with 81440859383166208

• 81440859383166208 backwards is 80266138395804418
• The number of decimal digits it has is: 17
• The sum of 81440859383166208's digits is 76
• More coming soon!