640625000000

Names of 640625000000

• Cardinal: 640625000000 can be written as Six hundred forty billion, six hundred twenty-five million.

Scientific notation

• Scientific notation: 6.40625 × 10¹¹

Factors of 640625000000

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 48

Divisors of 640625000000

• Number of divisors d(n): 182
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 41 50 64 80 82 100 125 160 164 200 205 250 320 328 400 410 500 625 656 800 820 1000 1025 1250 1312 1600 1640 2000 2050 2500 2624 3125 3280 4000 4100 5000 5125 6250 6560 8000 8200 10000 10250 12500 13120 15625 16400 20000 20500 25000 25625 31250 32800 40000 41000 50000 51250 62500 65600 78125 82000 100000 102500 125000 128125 156250 164000 200000 205000 250000 256250 312500 328000 390625 410000 500000 512500 625000 640625 781250 820000 1000000 1025000 1250000 1281250 1562500 1640000 1953125 2050000 2500000 2562500 3125000 3203125 3906250 4100000 5000000 5125000 6250000 6406250 7812500 8200000 9765625 10250000 12500000 12812500 15625000 16015625 19531250 20500000 25000000 25625000 31250000 32031250 39062500 41000000 48828125 51250000 62500000 64062500 78125000 80078125 97656250 102500000 125000000 128125000 156250000 160156250 195312500 205000000 244140625 256250000 312500000 320312500 390625000 400390625 488281250 512500000 625000000 640625000 781250000 800781250 976562500 1025000000 1281250000 1562500000 1601562500 1953125000 2001953125 2562500000 3125000000 3203125000 3906250000 4003906250 5125000000 6406250000 7812500000 8007812500 10009765625 12812500000 15625000000 16015625000 20019531250 25625000000 32031250000 40039062500 64062500000 80078125000 128125000000 160156250000 320312500000 640625000000
• Sum of all divisors σ(n): 1627807615854
• Sum of proper divisors (its aliquot sum) s(n): 987182615854
• 640625000000 is an abundant number, because the sum of its proper divisors (987182615854) is greater than itself. Its abundance is 346557615854

Bases of 640625000000

• Binary: 1001010100101000001110011011111001000000₂
• Hexadecimal: 0x952839BE40
• Base-36: 86ARL1KW

Squares and roots of 640625000000

• 640625000000 squared (640625000000²) is 410400390625000000000000
• 640625000000 cubed (640625000000³) is 262912750244140625000000000000000000
• The square root of 640625000000 is 800390.5296791061
• The cube root of 640625000000 is 8620.5431009569

Scales and comparisons

• 640,625,000,000 seconds is equal to 20,369 years, 46 weeks, 3 days, 4 hours, 53 minutes, 20 seconds.
• To count from 1 to 640,625,000,000 would take you about forty thousand, seven hundred thirty-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 640625000000 cubic inches would be around 718.4 feet tall.

Recreational maths with 640625000000

• 640625000000 backwards is 000000526046
• The number of decimal digits it has is: 12
• The sum of 640625000000's digits is 23
• More coming soon!