640243169055

Names of 640243169055

• Cardinal: 640243169055 can be written as Six hundred forty billion, two hundred forty-three million, one hundred sixty-nine thousand and fifty-five.

Scientific notation

• Scientific notation: 6.40243169055 × 10¹¹

Factors of 640243169055

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 132809

Divisors of 640243169055

• Number of divisors d(n): 80
• Complete list of divisors:
  1 3 5 7 9 15 21 27 35 45 63 81 105 135 189 315 405 567 945 1723 2835 5169 8615 12061 15507 25845 36183 46521 60305 77535 108549 131071 139563 180915 232605 325647 393213 542745 655355 697815 917497 976941 1179639 1628235 1966065 2752491 3538917 4587485 4884705 5898195 8257473 10616751 13762455 17694585 24772419 41287365 53083755 74317257 123862095 225835333 371586285 677505999 1129176665 1580847331 2032517997 3387529995 4742541993 6097553991 7904236655 10162589985 14227625979 18292661973 23712709965 30487769955 42682877937 71138129895 91463309865 128048633811 213414389685 640243169055
• Sum of all divisors σ(n): 1312422887424
• Sum of proper divisors (its aliquot sum) s(n): 672179718369
• 640243169055 is an abundant number, because the sum of its proper divisors (672179718369) is greater than itself. Its abundance is 31936549314

Bases of 640243169055

• Binary: 1001010100010001011101110111011100011111₂
• Hexadecimal: 0x951177771F
• Base-36: 864G92XR

Squares and roots of 640243169055

• 640243169055 squared (640243169055²) is 409911315521589309593025
• 640243169055 cubed (640243169055³) is 262442919681046349844047838323841375
• The square root of 640243169055 is 800151.9662257913
• The cube root of 640243169055 is 8618.8300632743

Scales and comparisons

• 640,243,169,055 seconds is equal to 20,357 years, 39 weeks, 20 hours, 44 minutes, 15 seconds.
• To count from 1 to 640,243,169,055 would take you about forty thousand, seven hundred fifteen 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 640243169055 cubic inches would be around 718.2 feet tall.

Recreational maths with 640243169055

• 640243169055 backwards is 550961342046
• 640243169055 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640243169055's digits is 45
• More coming soon!