640689138639

Names of 640689138639

• Cardinal: 640689138639 can be written as Six hundred forty billion, six hundred eighty-nine million, one hundred thirty-eight thousand, six hundred thirty-nine.

Scientific notation

• Scientific notation: 6.40689138639 × 10¹¹

Factors of 640689138639

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4698

Divisors of 640689138639

• Number of divisors d(n): 192
• Complete list of divisors:
  1 3 9 11 19 27 31 33 57 73 93 99 121 171 209 219 279 297 341 363 513 589 627 657 803 837 1023 1089 1387 1767 1881 1971 2263 2299 2409 3069 3267 3751 4161 4561 5301 5643 6479 6789 6897 7227 8833 9207 11253 12483 13683 15257 15903 19437 20367 20691 21681 24893 26499 33759 37449 41049 42997 45771 50171 58311 61101 62073 71269 74679 79497 86659 101277 123147 128991 137313 141391 150513 167827 174933 213807 224037 238491 259977 273823 332953 386973 411939 424173 451539 472967 503481 551881 641421 672111 779931 821469 953249 998859 1160919 1272519 1354617 1418901 1510443 1555301 1655643 1924263 2339793 2464407 2686429 2859747 2996577 3662483 3817557 4256703 4531329 4665903 4966929 5202637 6326107 7393221 8059287 8579241 8989731 10321543 10485739 10987449 12770109 13997709 14900787 15607911 17108311 18978321 24177861 25737723 29550719 30964629 31457217 32962347 40287313 41993127 46823733 51324933 56934963 69587177 72533583 88652157 92893887 94371651 98887041 113536973 120861939 140471199 153974799 170804889 196109317 208761531 265956471 278681661 283114953 325057909 340610919 362585817 461924397 588327951 626284593 765458947 797869413 975173727 1021832757 1087757451 1248906703 1764983853 1878853779 2157202487 2296376841 2925521181 3065498271 3746720109 5294951559 6471607461 6889130523 8776563543 11240160327 19414822383 20667391569 23729227357 33720480981 58244467149 71187682071 213563046213 640689138639
• Sum of all divisors σ(n): 1149419622400
• Sum of proper divisors (its aliquot sum) s(n): 508730483761
• 640689138639 is a deficient number, because the sum of its proper divisors (508730483761) is less than itself. Its deficiency is 131958654878

Bases of 640689138639

• Binary: 1001010100101100000011000110101111001111₂
• Hexadecimal: 0x952C0C6BCF
• Base-36: 86BTRR9R

Squares and roots of 640689138639

• 640689138639 squared (640689138639²) is 410482572369983762772321
• 640689138639 cubed (640689138639³) is 262991725718045877789014456160811119
• The square root of 640689138639 is 800430.5957664287
• The cube root of 640689138639 is 8620.8307843131

Scales and comparisons

• 640,689,138,639 seconds is equal to 20,371 years, 48 weeks, 3 days, 13 hours, 10 minutes, 39 seconds.
• To count from 1 to 640,689,138,639 would take you about forty thousand, seven hundred forty-three 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 640689138639 cubic inches would be around 718.4 feet tall.

Recreational maths with 640689138639

• 640689138639 backwards is 936831986046
• The number of decimal digits it has is: 12
• The sum of 640689138639's digits is 63
• More coming soon!