81620100672

Names of 81620100672

• Cardinal: 81620100672 can be written as Eighty-one billion, six hundred twenty million, one hundred thousand, six hundred seventy-two.

Scientific notation

• Scientific notation: 8.1620100672 × 10¹⁰

Factors of 81620100672

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 38645897

Divisors of 81620100672

• Number of divisors d(n): 56
• Complete list of divisors:
  1 2 3 4 6 8 11 12 16 22 24 32 33 44 48 64 66 88 96 132 176 192 264 352 528 704 1056 2112 38645881 77291762 115937643 154583524 231875286 309167048 425104691 463750572 618334096 850209382 927501144 1236668192 1275314073 1700418764 1855002288 2473336384 2550628146 3400837528 3710004576 5101256292 6801675056 7420009152 10202512584 13603350112 20405025168 27206700224 40810050336 81620100672
• Sum of all divisors σ(n): 235585296672
• Sum of proper divisors (its aliquot sum) s(n): 153965196000
• 81620100672 is an abundant number, because the sum of its proper divisors (153965196000) is greater than itself. Its abundance is 72345095328

Bases of 81620100672

• Binary: 1001100000000111011111110011001000000₂
• Hexadecimal: 0x1300EFE640
• Base-36: 11HUI0QO

Squares and roots of 81620100672

• 81620100672 squared (81620100672²) is 6661840833707414851584
• 81620100672 cubed (81620100672³) is 543740119508039611179154018664448
• The square root of 81620100672 is 285692.3181886415
• The cube root of 81620100672 is 4337.7618882001

Scales and comparisons

• 81,620,100,672 seconds is equal to 2,595 years, 13 weeks, 6 days, 2 hours, 11 minutes, 12 seconds.
• To count from 1 to 81,620,100,672 would take you about five thousand, one hundred ninety 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 81620100672 cubic inches would be around 361.5 feet tall.

Recreational maths with 81620100672

• 81620100672 backwards is 27600102618
• 81620100672 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81620100672's digits is 33
• More coming soon!