81274395942

Names of 81274395942

• Cardinal: 81274395942 can be written as Eighty-one billion, two hundred seventy-four million, three hundred ninety-five thousand, nine hundred forty-two.

Scientific notation

• Scientific notation: 8.1274395942 × 10¹⁰

Factors of 81274395942

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 464410

Divisors of 81274395942

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 6 9 18 71 137 142 213 274 411 426 639 822 1233 1278 2466 9727 19454 29181 58362 87543 175086 464197 928394 1392591 2785182 4177773 8355546 32957987 63594989 65915974 98873961 127189978 190784967 197747922 296621883 381569934 572354901 593243766 1144709802 4515244219 9030488438 13545732657 27091465314 40637197971 81274395942
• Sum of all divisors σ(n): 179878581792
• Sum of proper divisors (its aliquot sum) s(n): 98604185850
• 81274395942 is an abundant number, because the sum of its proper divisors (98604185850) is greater than itself. Its abundance is 17329789908

Bases of 81274395942

• Binary: 1001011101100010101001101110100100110₂
• Hexadecimal: 0x12EC54DD26
• Base-36: 11C4OD9I

Squares and roots of 81274395942

• 81274395942 squared (81274395942²) is 6605527435736986067364
• 81274395942 cubed (81274395942³) is 536860252217831766212679220236888
• The square root of 81274395942 is 285086.6463761501
• The cube root of 81274395942 is 4331.6289749965

Scales and comparisons

• 81,274,395,942 seconds is equal to 2,584 years, 14 weeks, 1 day, 21 hours, 5 minutes, 42 seconds.
• To count from 1 to 81,274,395,942 would take you about five thousand, one hundred sixty-eight 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 81274395942 cubic inches would be around 361 feet tall.

Recreational maths with 81274395942

• 81274395942 backwards is 24959347218
• The number of decimal digits it has is: 11
• The sum of 81274395942's digits is 54
• More coming soon!