72138928666

Names of 72138928666

• Cardinal: 72138928666 can be written as Seventy-two billion, one hundred thirty-eight million, nine hundred twenty-eight thousand, six hundred sixty-six.

Scientific notation

• Scientific notation: 7.2138928666 × 10¹⁰

Factors of 72138928666

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 8092

Divisors of 72138928666

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 7 14 49 98 191 382 523 1046 1337 2674 3661 7322 7369 9359 14738 18718 25627 51254 51583 99893 103166 199786 361081 699251 722162 1398502 1407479 2814958 3853987 4894757 7707974 9789514 9852353 19704706 26977909 53955818 68966471 137932942 188845363 377690726 736111517 1472223034 5152780619 10305561238 36069464333 72138928666
• Sum of all divisors σ(n): 126793244160
• Sum of proper divisors (its aliquot sum) s(n): 54654315494
• 72138928666 is a deficient number, because the sum of its proper divisors (54654315494) is less than itself. Its deficiency is 17484613172

Bases of 72138928666

• Binary: 1000011001011110100001011001000011010₂
• Hexadecimal: 0x10CBD0B21A
• Base-36: X51NLLM

Squares and roots of 72138928666

• 72138928666 squared (72138928666²) is 5204025029078236539556
• 72138928666 cubed (72138928666³) is 375412790348753481460104971312296
• The square root of 72138928666 is 268586.9108240385
• The cube root of 72138928666 is 4162.8416979469

Scales and comparisons

• 72,138,928,666 seconds is equal to 2,293 years, 41 weeks, 2 days, 7 hours, 17 minutes, 46 seconds.
• To count from 1 to 72,138,928,666 would take you about four thousand, five hundred eighty-seven 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 72138928666 cubic inches would be around 346.9 feet tall.

Recreational maths with 72138928666

• 72138928666 backwards is 66682983127
• The number of decimal digits it has is: 11
• The sum of 72138928666's digits is 58
• More coming soon!