81456472388742

Names of 81456472388742

• Cardinal: 81456472388742 can be written as Eighty-one trillion, four hundred fifty-six billion, four hundred seventy-two million, three hundred eighty-eight thousand, seven hundred forty-two.

Scientific notation

• Scientific notation: 8.1456472388742 × 10¹³

Factors of 81456472388742

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 31793044

Divisors of 81456472388742

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 3 6 11 22 33 66 38867 77734 116601 233202 427537 855074 1282611 2565222 31754161 63508322 95262483 190524966 349295771 698591542 1047887313 2095774626 1234188975587 2468377951174 3702566926761 7405133853522 13576078731457 27152157462914 40728236194371 81456472388742
• Sum of all divisors σ(n): 177727790680704
• Sum of proper divisors (its aliquot sum) s(n): 96271318291962
• 81456472388742 is an abundant number, because the sum of its proper divisors (96271318291962) is greater than itself. Its abundance is 14814845903220

Bases of 81456472388742

• Binary: 10010100001010110010000000110011111010010000110₂
• Hexadecimal: 0x4A159019F486
• Base-36: SVGL4ILC6

Squares and roots of 81456472388742

• 81456472388742 squared (81456472388742²) is 6635156894017887827568342564
• 81456472388742 cubed (81456472388742³) is 540476474332539208619763274015446833014488
• The square root of 81456472388742 is 9025323.9492409357
• The cube root of 81456472388742 is 43348.6123274059

Scales and comparisons

• 81,456,472,388,742 seconds is equal to 2,590,063 years, 44 weeks, 5 days, 5 hours, 45 minutes, 42 seconds.
• To count from 1 to 81,456,472,388,742 would take you about six million, four hundred seventy-five thousand, one hundred fifty-nine 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 81456472388742 cubic inches would be around 3612.4 feet tall.

Recreational maths with 81456472388742

• 81456472388742 backwards is 24788327465418
• The number of decimal digits it has is: 14
• The sum of 81456472388742's digits is 69
• More coming soon!