640631534490

Names of 640631534490

• Cardinal: 640631534490 can be written as Six hundred forty billion, six hundred thirty-one million, five hundred thirty-four thousand, four hundred ninety.

Scientific notation

• Scientific notation: 6.4063153449 × 10¹¹

Factors of 640631534490

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 28133

Divisors of 640631534490

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 45 54 81 90 135 162 270 405 810 28123 56246 84369 140615 168738 253107 281230 421845 506214 759321 843690 1265535 1518642 2277963 2531070 3796605 4555926 7593210 11389815 22779630 790903129 1581806258 2372709387 3954515645 4745418774 7118128161 7909031290 11863546935 14236256322 21354384483 23727093870 35590640805 42708768966 64063153449 71181281610 106771922415 128126306898 213543844830 320315767245 640631534490
• Sum of all divisors σ(n): 1722648269034
• Sum of proper divisors (its aliquot sum) s(n): 1082016734544
• 640631534490 is an abundant number, because the sum of its proper divisors (1082016734544) is greater than itself. Its abundance is 441385200054

Bases of 640631534490

• Binary: 1001010100101000100111010111001110011010₂
• Hexadecimal: 0x95289D739A
• Base-36: 86AVH3MI

Squares and roots of 640631534490

• 640631534490 squared (640631534490²) is 410408762983012059560100
• 640631534490 cubed (640631534490³) is 262920795597949725518162137377849000
• The square root of 640631534490 is 800394.6117322379
• The cube root of 640631534490 is 8620.5724112195

Scales and comparisons

• 640,631,534,490 seconds is equal to 20,370 years, 5 weeks, 1 day, 20 hours, 1 minute, 30 seconds.
• To count from 1 to 640,631,534,490 would take you about forty thousand, seven hundred forty 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 640631534490 cubic inches would be around 718.4 feet tall.

Recreational maths with 640631534490

• 640631534490 backwards is 094435136046
• 640631534490 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640631534490's digits is 45
• More coming soon!