81647696480

Names of 81647696480

• Cardinal: 81647696480 can be written as Eighty-one billion, six hundred forty-seven million, six hundred ninety-six thousand, four hundred eighty.

Scientific notation

• Scientific notation: 8.164769648 × 10¹⁰

Factors of 81647696480

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 10414261

Divisors of 81647696480

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 32 35 40 49 56 70 80 98 112 140 160 196 224 245 280 392 490 560 784 980 1120 1568 1960 3920 7840 10414247 20828494 41656988 52071235 72899729 83313976 104142470 145799458 166627952 208284940 291598916 333255904 364498645 416569880 510298103 583197832 728997290 833139760 1020596206 1166395664 1457994580 1666279520 2041192412 2332791328 2551490515 2915989160 4082384824 5102981030 5831978320 8164769648 10205962060 11663956640 16329539296 20411924120 40823848240 81647696480
• Sum of all divisors σ(n): 224385387408
• Sum of proper divisors (its aliquot sum) s(n): 142737690928
• 81647696480 is an abundant number, because the sum of its proper divisors (142737690928) is greater than itself. Its abundance is 61089994448

Bases of 81647696480

• Binary: 1001100000010100101001111101001100000₂
• Hexadecimal: 0x130294FA60
• Base-36: 11IAXHSW

Squares and roots of 81647696480

• 81647696480 squared (81647696480²) is 6666346340490204390400
• 81647696480 cubed (81647696480³) is 544291822638902942480542625792000
• The square root of 81647696480 is 285740.6104844041
• The cube root of 81647696480 is 4338.2506998005

Scales and comparisons

• 81,647,696,480 seconds is equal to 2,596 years, 7 weeks, 3 days, 11 hours, 41 minutes, 20 seconds.
• To count from 1 to 81,647,696,480 would take you about five thousand, one hundred ninety-two 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 81647696480 cubic inches would be around 361.5 feet tall.

Recreational maths with 81647696480

• 81647696480 backwards is 08469674618
• The number of decimal digits it has is: 11
• The sum of 81647696480's digits is 59
• More coming soon!