640718018031

Names of 640718018031

• Cardinal: 640718018031 can be written as Six hundred forty billion, seven hundred eighteen million, eighteen thousand and thirty-one.

Scientific notation

• Scientific notation: 6.40718018031 × 10¹¹

Factors of 640718018031

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 4040

Divisors of 640718018031

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 7 13 19 21 39 49 57 67 91 133 147 201 247 273 399 469 637 741 871 931 1273 1407 1729 1911 2613 2793 3283 3819 3931 4489 5187 6097 8911 9849 11793 12103 13467 16549 18291 26733 27517 31423 36309 42679 49647 51103 58357 62377 74689 82551 85291 94269 115843 128037 153309 175071 187131 192619 219961 224067 255873 263377 347529 357721 408499 522823 577857 597037 659883 790131 810901 970957 1073163 1108783 1225497 1568469 1791111 1843639 2432703 2504047 2859493 2912871 3326349 3423901 3659761 4179259 5004163 5530917 6796699 7512141 7761481 8578479 10271703 10979283 12537777 12905473 15012489 17646259 20390097 23284443 23967307 35029141 38716419 47576893 52938777 54330367 65054119 71901921 105087423 123523813 142730679 162991101 167771149 195162357 229401367 245203987 335278921 370571439 455378833 503313447 688204101 735611961 864666691 1005836763 1366136499 1605809569 2346952447 2594000073 3187651831 4358625973 4817428707 7040857341 9562955493 11240666983 13075877919 16428667129 30510381811 33722000949 49286001387 91531145433 213572672677 640718018031
• Sum of all divisors σ(n): 1143893036160
• Sum of proper divisors (its aliquot sum) s(n): 503175018129
• 640718018031 is a deficient number, because the sum of its proper divisors (503175018129) is less than itself. Its deficiency is 137542999902

Bases of 640718018031

• Binary: 1001010100101101110001010001010111101111₂
• Hexadecimal: 0x952DC515EF
• Base-36: 86CAYQR3

Squares and roots of 640718018031

• 640718018031 squared (640718018031²) is 410519578629572841116961
• 640718018031 cubed (640718018031³) is 263027290782461173884604916177923791
• The square root of 640718018031 is 800448.6354732575
• The cube root of 640718018031 is 8620.9603118257

Scales and comparisons

• 640,718,018,031 seconds is equal to 20,372 years, 44 weeks, 1 day, 19 hours, 13 minutes, 51 seconds.
• To count from 1 to 640,718,018,031 would take you about forty thousand, seven hundred forty-five 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 640718018031 cubic inches would be around 718.4 feet tall.

Recreational maths with 640718018031

• 640718018031 backwards is 130810817046
• 640718018031 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640718018031's digits is 39
• More coming soon!