81491979024

Names of 81491979024

• Cardinal: 81491979024 can be written as Eighty-one billion, four hundred ninety-one million, nine hundred seventy-nine thousand and twenty-four.

Scientific notation

• Scientific notation: 8.1491979024 × 10¹⁰

Factors of 81491979024

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 23794

Divisors of 81491979024

• Number of divisors d(n): 45
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 36 48 72 144 23789 47578 71367 95156 142734 190312 214101 285468 380624 428202 570936 856404 1141872 1712808 3425616 565916521 1131833042 1697749563 2263666084 3395499126 4527332168 5093248689 6790998252 9054664336 10186497378 13581996504 20372994756 27163993008 40745989512 81491979024
• Sum of all divisors σ(n): 228073945333
• Sum of proper divisors (its aliquot sum) s(n): 146581966309
• 81491979024 is an abundant number, because the sum of its proper divisors (146581966309) is greater than itself. Its abundance is 65089987285

Bases of 81491979024

• Binary: 1001011111001010011001110101100010000₂
• Hexadecimal: 0x12F94CEB10
• Base-36: 11FQ7XG0

Squares and roots of 81491979024

• 81491979024 squared (81491979024²) is 6640942645248055992576
• 81491979024 cubed (81491979024³) is 541183558746141652223780891725824
• 81491979024 is a perfect square number. Its square root is 285468
• The cube root of 81491979024 is 4335.4909923071

Scales and comparisons

• 81,491,979,024 seconds is equal to 2,591 years, 10 weeks, 4 hours, 50 minutes, 24 seconds.
• To count from 1 to 81,491,979,024 would take you about five thousand, one hundred eighty-two 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 81491979024 cubic inches would be around 361.3 feet tall.

Recreational maths with 81491979024

• 81491979024 backwards is 42097919418
• The number of decimal digits it has is: 11
• The sum of 81491979024's digits is 54
• More coming soon!