6438994965

Names of 6438994965

• Cardinal: 6438994965 can be written as Six billion, four hundred thirty-eight million, nine hundred ninety-four thousand, nine hundred sixty-five.

Scientific notation

• Scientific notation: 6.438994965 × 10⁹

Factors of 6438994965

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 39503

Divisors of 6438994965

• Number of divisors d(n): 80
• Complete list of divisors:
  1 3 5 9 13 15 27 31 39 45 65 81 93 117 135 155 195 279 351 403 405 465 585 837 1053 1209 1395 1755 2015 2511 3627 4185 5265 6045 10881 12555 18135 32643 39451 54405 118353 163215 197255 355059 512863 591765 1065177 1222981 1538589 1775295 2564315 3195531 3668943 4615767 5325885 6114905 7692945 11006829 13847301 15898753 15977655 18344715 23078835 33020487 41541903 47696259 55034145 69236505 79493765 99061461 143088777 165102435 207709515 238481295 429266331 495307305 715443885 1287798993 2146331655 6438994965
• Sum of all divisors σ(n): 12831684096
• Sum of proper divisors (its aliquot sum) s(n): 6392689131
• 6438994965 is a deficient number, because the sum of its proper divisors (6392689131) is less than itself. Its deficiency is 46305834

Bases of 6438994965

• Binary: 101111111110010110100010000010101₂
• Hexadecimal: 0x17FCB4415
• Base-36: 2YHM0B9

Squares and roots of 6438994965

• 6438994965 squared (6438994965²) is 41460656159295351225
• 6438994965 cubed (6438994965³) is 266964956255299004485681582125
• The square root of 6438994965 is 80243.3484159279
• The cube root of 6438994965 is 1860.3987048511

Scales and comparisons

• 6,438,994,965 seconds is equal to 204 years, 38 weeks, 3 days, 9 hours, 42 minutes, 45 seconds.
• To count from 1 to 6,438,994,965 would take you about four hundred nine 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 6438994965 cubic inches would be around 155 feet tall.

Recreational maths with 6438994965

• 6438994965 backwards is 5694998346
• The number of decimal digits it has is: 10
• The sum of 6438994965's digits is 63
• More coming soon!