81713994320

Names of 81713994320

• Cardinal: 81713994320 can be written as Eighty-one billion, seven hundred thirteen million, nine hundred ninety-four thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.171399432 × 10¹⁰

Factors of 81713994320

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 262542

Divisors of 81713994320

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 35 40 56 70 80 112 140 280 557 560 1114 2228 2785 3899 4456 5570 7798 8912 11140 15596 19495 22280 31192 38990 44560 62384 77980 155960 261971 311920 523942 1047884 1309855 1833797 2095768 2619710 3667594 4191536 5239420 7335188 9168985 10478840 14670376 18337970 20957680 29340752 36675940 73351880 145917847 146703760 291835694 583671388 729589235 1021424929 1167342776 1459178470 2042849858 2334685552 2918356940 4085699716 5107124645 5836713880 8171399432 10214249290 11673427760 16342798864 20428498580 40856997160 81713994320
• Sum of all divisors σ(n): 217516399488
• Sum of proper divisors (its aliquot sum) s(n): 135802405168
• 81713994320 is an abundant number, because the sum of its proper divisors (135802405168) is greater than itself. Its abundance is 54088410848

Bases of 81713994320

• Binary: 1001100000110100010001001101001010000₂
• Hexadecimal: 0x1306889A50
• Base-36: 11JEEHJK

Squares and roots of 81713994320

• 81713994320 squared (81713994320²) is 6677176867728992262400
• 81713994320 cubed (81713994320³) is 545618792643242265029077549568000
• The square root of 81713994320 is 285856.5974750277
• The cube root of 81713994320 is 4339.4246003923

Scales and comparisons

• 81,713,994,320 seconds is equal to 2,598 years, 13 weeks, 19 hours, 45 minutes, 20 seconds.
• To count from 1 to 81,713,994,320 would take you about five thousand, one hundred ninety-six 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 81713994320 cubic inches would be around 361.6 feet tall.

Recreational maths with 81713994320

• 81713994320 backwards is 02349931718
• The number of decimal digits it has is: 11
• The sum of 81713994320's digits is 47
• More coming soon!