640410149561

Names of 640410149561

• Cardinal: 640410149561 can be written as Six hundred forty billion, four hundred ten million, one hundred forty-nine thousand, five hundred sixty-one.

Scientific notation

• Scientific notation: 6.40410149561 × 10¹¹

Factors of 640410149561

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2760

Divisors of 640410149561

• Number of divisors d(n): 72
• Complete list of divisors:
  1 7 13 47 49 91 169 329 611 637 1183 2197 2209 2303 2693 4277 7943 8281 15379 15463 18851 28717 29939 35009 55601 103259 107653 108241 126571 131957 201019 245063 373321 389207 455117 722813 885997 1407133 1645423 1715441 2613247 3185819 4853173 5059691 5916521 5948837 6201979 11517961 18292729 21390499 22300733 33972211 41415647 41641859 77334881 80625727 149733493 237805477 278076487 289909529 291493013 541344167 1005353453 1048134451 1946535409 3789409169 7037474171 13069594889 13625747863 49262319197 91487164223 640410149561
• Sum of all divisors σ(n): 824861366280
• Sum of proper divisors (its aliquot sum) s(n): 184451216719
• 640410149561 is a deficient number, because the sum of its proper divisors (184451216719) is less than itself. Its deficiency is 455958932842

Bases of 640410149561

• Binary: 1001010100011011011010110110001010111001₂
• Hexadecimal: 0x951B6B62B9
• Base-36: 8677O1X5

Squares and roots of 640410149561

• 640410149561 squared (640410149561²) is 410125159660742388492721
• 640410149561 cubed (640410149561³) is 262648314837065037034915820969845481
• The square root of 640410149561 is 800256.3024187939
• The cube root of 640410149561 is 8619.5792845997

Scales and comparisons

• 640,410,149,561 seconds is equal to 20,363 years, 3 weeks, 1 day, 12 hours, 12 minutes, 41 seconds.
• To count from 1 to 640,410,149,561 would take you about forty thousand, seven hundred twenty-six 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 640410149561 cubic inches would be around 718.3 feet tall.

Recreational maths with 640410149561

• 640410149561 backwards is 165941014046
• The number of decimal digits it has is: 12
• The sum of 640410149561's digits is 41
• More coming soon!