640668984722

Names of 640668984722

• Cardinal: 640668984722 can be written as Six hundred forty billion, six hundred sixty-eight million, nine hundred eighty-four thousand, seven hundred twenty-two.

Scientific notation

• Scientific notation: 6.40668984722 × 10¹¹

Factors of 640668984722

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 229

Divisors of 640668984722

• Number of divisors d(n): 90
• Complete list of divisors:
  1 2 13 17 26 34 169 197 221 289 338 394 442 578 2197 2561 2873 3349 3757 4394 5122 5746 6698 7514 28561 33293 37349 38809 43537 48841 56933 57122 66586 74698 77618 87074 97682 113866 432809 485537 504517 565981 634933 659753 740129 865618 971074 1009034 1131962 1269866 1319506 1480258 5626517 6558721 7357753 8254129 8576789 9621677 11215801 11253034 13117442 14715506 16508258 17153578 19243354 22431602 85263373 95650789 111498257 125081801 145805413 170526746 191301578 222996514 250163602 291610826 1108423849 1449477341 1626063413 1895470369 2216847698 2898954682 3252126826 3790940738 18843205433 24641114797 37686410866 49282229594 320334492361 640668984722
• Sum of all divisors σ(n): 1111569255627
• Sum of proper divisors (its aliquot sum) s(n): 470900270905
• 640668984722 is a deficient number, because the sum of its proper divisors (470900270905) is less than itself. Its deficiency is 169768713817

Bases of 640668984722

• Binary: 1001010100101010110110001110010110010010₂
• Hexadecimal: 0x952AD8E592
• Base-36: 86BHRSEQ

Squares and roots of 640668984722

• 640668984722 squared (640668984722²) is 410456747984718269417284
• 640668984722 cubed (640668984722³) is 262966908003663273238776202838735048
• The square root of 640668984722 is 800418.0062454869
• The cube root of 640668984722 is 8620.7403892895

Scales and comparisons

• 640,668,984,722 seconds is equal to 20,371 years, 15 weeks, 1 day, 6 hours, 52 minutes, 2 seconds.
• To count from 1 to 640,668,984,722 would take you about forty thousand, seven hundred forty-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 640668984722 cubic inches would be around 718.4 feet tall.

Recreational maths with 640668984722

• 640668984722 backwards is 227489866046
• The number of decimal digits it has is: 12
• The sum of 640668984722's digits is 62
• More coming soon!