640454732720

Names of 640454732720

• Cardinal: 640454732720 can be written as Six hundred forty billion, four hundred fifty-four million, seven hundred thirty-two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 6.4045473272 × 10¹¹

Factors of 640454732720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 4537

Divisors of 640454732720

• Number of divisors d(n): 140
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 40 44 55 80 88 110 121 176 220 242 440 484 605 880 968 1210 1331 1936 2420 2662 4519 4840 5324 6655 9038 9680 10648 13310 14641 18076 21296 22595 26620 29282 36152 45190 49709 53240 58564 72304 73205 90380 99418 106480 117128 146410 161051 180760 198836 234256 248545 292820 322102 361520 397672 497090 546799 585640 644204 795344 805255 994180 1093598 1171280 1288408 1610510 1771561 1988360 2187196 2576816 2733995 3221020 3543122 3976720 4374392 5467990 6014789 6442040 7086244 8748784 8857805 10935980 12029578 12884080 14172488 17715610 21871960 24059156 28344976 30073945 35431220 43743920 48118312 60147890 66162679 70862440 96236624 120295780 132325358 141724880 240591560 264650716 330813395 481183120 529301432 661626790 727789469 1058602864 1323253580 1455578938 2646507160 2911157876 3638947345 5293014320 5822315752 7277894690 8005684159 11644631504 14555789380 16011368318 29111578760 32022736636 40028420795 58223157520 64045473272 80056841590 128090946544 160113683180 320227366360 640454732720
• Sum of all divisors σ(n): 1638325356240
• Sum of proper divisors (its aliquot sum) s(n): 997870623520
• 640454732720 is an abundant number, because the sum of its proper divisors (997870623520) is greater than itself. Its abundance is 357415890800

Bases of 640454732720

• Binary: 1001010100011110000100111010101110110000₂
• Hexadecimal: 0x951E13ABB0
• Base-36: 867Y7MI8

Squares and roots of 640454732720

• 640454732720 squared (640454732720²) is 410182264663446638598400
• 640454732720 cubed (640454732720³) is 262703172681512017677520707419648000
• The square root of 640454732720 is 800284.1574840777
• The cube root of 640454732720 is 8619.7793018109

Scales and comparisons

• 640,454,732,720 seconds is equal to 20,364 years, 24 weeks, 6 days, 12 hours, 25 minutes, 20 seconds.
• To count from 1 to 640,454,732,720 would take you about forty thousand, seven hundred twenty-eight 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 640454732720 cubic inches would be around 718.3 feet tall.

Recreational maths with 640454732720

• 640454732720 backwards is 027237454046
• 640454732720 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640454732720's digits is 44
• More coming soon!