640002208815

Names of 640002208815

• Cardinal: 640002208815 can be written as Six hundred forty billion, two million, two hundred eight thousand, eight hundred fifteen.

Scientific notation

• Scientific notation: 6.40002208815 × 10¹¹

Factors of 640002208815

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 7241

Divisors of 640002208815

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 5 9 15 37 45 111 185 333 555 1369 1665 1999 4107 5197 5997 6845 9995 12321 15591 17991 20535 25985 29985 46773 61605 73963 77955 89955 192289 221889 233865 369815 576867 665667 961445 1109445 1730601 2736631 2884335 3328335 7114693 8209893 8653005 10388803 13683155 21344079 24629679 31166409 35573465 41049465 51944015 64032237 93499227 106720395 123148395 155832045 320161185 384385711 467496135 1153157133 1921928555 3459471399 5765785665 14222271307 17297356995 42666813921 71111356535 128000441763 213334069605 640002208815
• Sum of all divisors σ(n): 1140919416000
• Sum of proper divisors (its aliquot sum) s(n): 500917207185
• 640002208815 is a deficient number, because the sum of its proper divisors (500917207185) is less than itself. Its deficiency is 139085001630

Bases of 640002208815

• Binary: 1001010100000011000110101011010000101111₂
• Hexadecimal: 0x95031AB42F
• Base-36: 860GSGTR

Squares and roots of 640002208815

• 640002208815 squared (640002208815²) is 409602827288078863704225
• 640002208815 cubed (640002208815³) is 262146714201239429088619332847743375
• The square root of 640002208815 is 800001.3805081839
• The cube root of 640002208815 is 8617.7486741737

Scales and comparisons

• 640,002,208,815 seconds is equal to 20,350 years, 4 weeks, 4 days, 23 hours, 20 minutes, 15 seconds.
• To count from 1 to 640,002,208,815 would take you about forty thousand, seven hundred 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 640002208815 cubic inches would be around 718.1 feet tall.

Recreational maths with 640002208815

• 640002208815 backwards is 518802200046
• The number of decimal digits it has is: 12
• The sum of 640002208815's digits is 36
• More coming soon!