81272887755438330

Names of 81272887755438330

• Cardinal: 81272887755438330 can be written as Eighty-one quadrillion, two hundred seventy-two trillion, eight hundred eighty-seven billion, seven hundred fifty-five million, four hundred thirty-eight thousand, three hundred thirty.

Scientific notation

• Scientific notation: 8.127288775543833 × 10¹⁶

Factors of 81272887755438330

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 129004583738808

Divisors of 81272887755438330

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 30 35 42 45 63 70 90 105 126 210 315 630 129004583738791 258009167477582 387013751216373 645022918693955 774027502432746 903032086171537 1161041253649119 1290045837387910 1806064172343074 1935068756081865 2322082507298238 2709096258514611 3870137512163730 4515160430857685 5418192517029222 5805206268245595 8127288775543833 9030320861715370 11610412536491190 13545481292573055 16254577551087666 27090962585146110 40636443877719165 81272887755438330
• Sum of all divisors σ(n): 241496580759018624
• Sum of proper divisors (its aliquot sum) s(n): 160223693003580294
• 81272887755438330 is an abundant number, because the sum of its proper divisors (160223693003580294) is greater than itself. Its abundance is 78950805248141964

Bases of 81272887755438330

• Binary: 100100000101111010100001011000100100010000111100011111010₂
• Hexadecimal: 0x120BD42C48878FA
• Base-36: M88U179T62I

Squares and roots of 81272887755438330

• 81272887755438330 squared (81272887755438330²) is 6605282284108077629804490433188900
• 81272887755438330 cubed (81272887755438330³) is 536830365669301106879519887239004998703499190537000
• The square root of 81272887755438330 is 285084001.2267232263
• The cube root of 81272887755438330 is 433160.2181215875

Scales and comparisons

• 81,272,887,755,438,330 seconds is equal to 2,584,226,437 years, 3 weeks, 6 days, 8 hours, 25 minutes, 30 seconds.
• To count from 1 to 81,272,887,755,438,330 would take you about seven billion, seven hundred fifty-two million, six hundred seventy-nine thousand, three hundred eleven 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 81272887755438330 cubic inches would be around 36096.7 feet tall.

Recreational maths with 81272887755438330

• 81272887755438330 backwards is 03383455778827218
• The number of decimal digits it has is: 17
• The sum of 81272887755438330's digits is 81
• More coming soon!