81440235474946816

Names of 81440235474946816

• Cardinal: 81440235474946816 can be written as Eighty-one quadrillion, four hundred forty trillion, two hundred thirty-five billion, four hundred seventy-four million, nine hundred forty-six thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 8.1440235474946816 × 10¹⁶

Factors of 81440235474946816

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 24471224601862

Divisors of 81440235474946816

• Number of divisors d(n): 36
• Complete list of divisors:
  1 2 4 8 13 16 26 32 52 64 104 128 208 256 416 832 1664 3328 24471224601847 48942449203694 97884898407388 195769796814776 318125919824011 391539593629552 636251839648022 783079187259104 1272503679296044 1566158374518208 2545007358592088 3132316749036416 5090014717184176 6264633498072832 10180029434368352 20360058868736704 40720117737473408 81440235474946816
• Sum of all divisors σ(n): 175067140801620592
• Sum of proper divisors (its aliquot sum) s(n): 93626905326673776
• 81440235474946816 is an abundant number, because the sum of its proper divisors (93626905326673776) is greater than itself. Its abundance is 12186669851726960

Bases of 81440235474946816

• Binary: 100100001010101010111011001110001111010001000101100000000₂
• Hexadecimal: 0x121557671E88B00
• Base-36: M9W5JOL7RB4

Squares and roots of 81440235474946816

• 81440235474946816 squared (81440235474946816²) is 6632511954214785840657998028537856
• 81440235474946816 cubed (81440235474946816³) is 540153335341651834074110229216059207624491842666496
• The square root of 81440235474946816 is 285377356.2757683407
• The cube root of 81440235474946816 is 433457.3187509161

Scales and comparisons

• 81,440,235,474,946,816 seconds is equal to 2,589,547,576 years, 47 weeks, 4 days, 1 hour, 40 minutes, 16 seconds.
• To count from 1 to 81,440,235,474,946,816 would take you about seven billion, seven hundred sixty-eight million, six hundred forty-two thousand, seven hundred thirty 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 81440235474946816 cubic inches would be around 36121.4 feet tall.

Recreational maths with 81440235474946816

• 81440235474946816 backwards is 61864947453204418
• The number of decimal digits it has is: 17
• The sum of 81440235474946816's digits is 76
• More coming soon!