640222721868

Names of 640222721868

• Cardinal: 640222721868 can be written as Six hundred forty billion, two hundred twenty-two million, seven hundred twenty-one thousand, eight hundred sixty-eight.

Scientific notation

• Scientific notation: 6.40222721868 × 10¹¹

Factors of 640222721868

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 518

Divisors of 640222721868

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 12 23 46 69 92 107 138 214 276 321 383 428 529 642 766 1058 1149 1284 1532 1587 2116 2298 2461 3174 4596 4922 6348 7383 8809 9844 11449 12167 14766 17618 22898 24334 26427 29532 34347 35236 36501 40981 45796 48668 52854 56603 68694 73002 81962 105708 113206 122943 137388 146004 163924 169809 202607 226412 245886 263327 339618 405214 491772 526654 607821 679236 789981 810428 942563 1053308 1215642 1301869 1579962 1885126 2431284 2603738 2827689 3159924 3770252 3905607 4384967 4659961 5207476 5655378 6056521 7811214 8769934 9319922 11310756 12113042 13154901 13979883 15622428 17539868 18169563 18639844 21678949 24226084 26309802 27959766 36339126 43357898 52619604 55919532 65036847 72678252 86715796 100854241 130073694 139299983 201708482 260147388 278599966 302562723 403416964 417899949 498615827 557199932 605125446 835799898 997231654 1210250892 1495847481 1671599796 1994463308 2319647543 2991694962 4639295086 5983389924 6958942629 9278590172 13917885258 27835770516 53351893489 106703786978 160055680467 213407573956 320111360934 640222721868
• Sum of all divisors σ(n): 1580598190080
• Sum of proper divisors (its aliquot sum) s(n): 940375468212
• 640222721868 is an abundant number, because the sum of its proper divisors (940375468212) is greater than itself. Its abundance is 300152746344

Bases of 640222721868

• Binary: 1001010100010000001111110111011101001100₂
• Hexadecimal: 0x95103F774C
• Base-36: 86442TSC

Squares and roots of 640222721868

• 640222721868 squared (640222721868²) is 409885133596070485409424
• 640222721868 cubed (640222721868³) is 262417775884105057038001413658084032
• The square root of 640222721868 is 800139.1890590037
• The cube root of 640222721868 is 8618.7383102683

Scales and comparisons

• 640,222,721,868 seconds is equal to 20,357 years, 5 weeks, 2 days, 4 hours, 57 minutes, 48 seconds.
• To count from 1 to 640,222,721,868 would take you about forty thousand, seven hundred fourteen 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 640222721868 cubic inches would be around 718.2 feet tall.

Recreational maths with 640222721868

• 640222721868 backwards is 868127222046
• The number of decimal digits it has is: 12
• The sum of 640222721868's digits is 48
• More coming soon!