640827907845

Names of 640827907845

• Cardinal: 640827907845 can be written as Six hundred forty billion, eight hundred twenty-seven million, nine hundred seven thousand, eight hundred forty-five.

Scientific notation

• Scientific notation: 6.40827907845 × 10¹¹

Factors of 640827907845

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 452

Divisors of 640827907845

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 5 15 17 31 37 51 85 93 111 155 185 255 289 359 465 527 555 629 867 1077 1147 1445 1581 1795 1887 2635 3145 3441 4335 5385 5735 6103 7905 8959 9435 10693 11129 13283 17205 18309 19499 26877 30515 32079 33387 39849 44795 53465 55645 58497 66415 91545 97495 103751 128881 134385 160395 166935 189193 199245 225811 292485 311253 331483 386643 411773 518755 567579 644405 677433 945965 994449 1129055 1235319 1556265 1657415 1933215 2058865 2190977 2837895 3216281 3387165 3838787 3995311 4768597 4972245 6176595 6572931 7000141 9648843 10954885 11516361 11985933 14305791 16081405 19193935 19976555 21000423 23842985 32864655 35000705 37246609 48244215 57581805 59929665 67920287 71528955 81066149 105002115 111739827 119002397 147826507 186233045 203760861 243198447 339601435 357007191 405330745 443479521 558699135 595011985 739132535 1018804305 1154644879 1215992235 1378124533 1785035955 2217397605 2513050619 3463934637 4134373599 5773224395 6890622665 7539151857 12565253095 17319673185 20671867995 37695759285 42721860523 128165581569 213609302615 640827907845
• Sum of all divisors σ(n): 1157933188608
• Sum of proper divisors (its aliquot sum) s(n): 517105280763
• 640827907845 is a deficient number, because the sum of its proper divisors (517105280763) is less than itself. Its deficiency is 123722627082

Bases of 640827907845

• Binary: 1001010100110100010100011101111100000101₂
• Hexadecimal: 0x953451DF05
• Base-36: 86E4E29X

Squares and roots of 640827907845

• 640827907845 squared (640827907845²) is 410660407472999812544025
• 640827907845 cubed (640827907845³) is 263162649755697673198664727705376125
• The square root of 640827907845 is 800517.2751696243
• The cube root of 640827907845 is 8621.4531451485

Scales and comparisons

• 640,827,907,845 seconds is equal to 20,376 years, 17 weeks, 6 days, 16 hours, 10 minutes, 45 seconds.
• To count from 1 to 640,827,907,845 would take you about forty thousand, seven hundred fifty-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 640827907845 cubic inches would be around 718.5 feet tall.

Recreational maths with 640827907845

• 640827907845 backwards is 548709728046
• The number of decimal digits it has is: 12
• The sum of 640827907845's digits is 60
• More coming soon!