81642342733

Names of 81642342733

• Cardinal: 81642342733 can be written as Eighty-one billion, six hundred forty-two million, three hundred forty-two thousand, seven hundred thirty-three.

Scientific notation

• Scientific notation: 8.1642342733 × 10¹⁰

Factors of 81642342733

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 5206

Divisors of 81642342733

• Number of divisors d(n): 64
• Complete list of divisors:
  1 7 17 19 53 119 133 137 323 371 901 959 1007 2261 2329 2603 4973 6307 7049 7261 16303 17119 18221 34811 44251 50827 84541 94487 119833 123437 137959 263569 309757 591787 661409 681301 864059 965713 1606279 1844983 2345303 4480673 4769107 5007811 11243953 11582117 12944719 16417121 31364711 35054677 36108953 81074819 85132787 90613033 220060223 252762671 595929509 613852201 686070107 1540421561 4296965407 4802490749 11663191819 81642342733
• Sum of all divisors σ(n): 106750794240
• Sum of proper divisors (its aliquot sum) s(n): 25108451507
• 81642342733 is a deficient number, because the sum of its proper divisors (25108451507) is less than itself. Its deficiency is 56533891226

Bases of 81642342733

• Binary: 1001100000010010000110100100101001101₂
• Hexadecimal: 0x130243494D
• Base-36: 11I7QQTP

Squares and roots of 81642342733

• 81642342733 squared (81642342733²) is 6665472126932637909289
• 81642342733 cubed (81642342733³) is 544184759864292904193961102346837
• The square root of 81642342733 is 285731.2421367323
• The cube root of 81642342733 is 4338.1558761237

Scales and comparisons

• 81,642,342,733 seconds is equal to 2,595 years, 50 weeks, 4 days, 12 hours, 32 minutes, 13 seconds.
• To count from 1 to 81,642,342,733 would take you about five thousand, one hundred ninety-one 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 81642342733 cubic inches would be around 361.5 feet tall.

Recreational maths with 81642342733

• 81642342733 backwards is 33724324618
• The number of decimal digits it has is: 11
• The sum of 81642342733's digits is 43
• More coming soon!