640942421991845760

Names of 640942421991845760

• Cardinal: 640942421991845760 can be written as Six hundred forty quadrillion, nine hundred forty-two trillion, four hundred twenty-one billion, nine hundred ninety-one million, eight hundred forty-five thousand, seven hundred sixty.

Scientific notation

• Scientific notation: 6.4094242199184576 × 10¹⁷

Factors of 640942421991845760

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 3589507291662

Divisors of 640942421991845760

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 31 32 36 40 45 48 60 62 64 72 80 90 93 96 120 124 128 144 155 160 180 186 192 240 248 279 288 310 320 360 372 384 465 480 496 558 576 620 640 720 744 930 960 992 1116 1152 1240 1395 1440 1488 1860 1920 1984 2232 2480 2790 2880 2976 3720 3968 4464 4960 5580 5760 5952 7440 8928 9920 11160 11904 14880 17856 19840 22320 29760 35712 44640 59520 89280 178560 3589507291621 7179014583242 10768521874863 14358029166484 17947536458105 21537043749726 28716058332968 32305565624589 35895072916210 43074087499452 53842609374315 57432116665936 64611131249178 71790145832420 86148174998904 107685218748630 111274726040251 114864233331872 129222262498356 143580291664840 161527828122945 172296349997808 215370437497260 222549452080502 229728466663744 258444524996712 287160583329680 323055656245890 333824178120753 344592699995616 430740874994520 445098904161004 459456933327488 516889049993424 556373630201255 574321166659360 646111312491780 667648356241506 689185399991232 861481749989040 890197808322008 1001472534362259 1033778099986848 1112747260402510 1148642333318720 1292222624983560 1335296712483012 1378370799982464 1669120890603765 1722963499978080 1780395616644016 2002945068724518 2067556199973696 2225494520805020 2297284666637440 2584445249967120 2670593424966024 3338241781207530 3445926999956160 3560791233288032 4005890137449036 4135112399947392 4450989041610040 5007362671811295 5168890499934240 5341186849932048 6676483562415060 6891853999912320 7121582466576064 8011780274898072 8901978083220080 10014725343622590 10337780999868480 10682373699864096 13352967124830120 14243164933152128 16023560549796144 17803956166440160 20029450687245180 20675561999736960 21364747399728192 26705934249660240 32047121099592288 35607912332880320 40058901374490360 42729494799456384 53411868499320480 64094242199184576 71215824665760640 80117802748980720 106823736998640960 128188484398369152 160235605497961440 213647473997281920 320471210995922880 640942421991845760
• Sum of all divisors σ(n): 2284649600971570560
• Sum of proper divisors (its aliquot sum) s(n): 1643707178979724800
• 640942421991845760 is an abundant number, because the sum of its proper divisors (1643707178979724800) is greater than itself. Its abundance is 1002764756987879040

Bases of 640942421991845760

• Binary: 100011100101000101011011110010101000010011010110111110000000₂
• Hexadecimal: 0x8E515BCA84D6F80
• Base-36: 4VAZ4JSZ0F40

Squares and roots of 640942421991845760

• 640942421991845760 squared (640942421991845760²) is 410807188308773287329727931629977600
• 640942421991845760 cubed (640942421991845760³) is 263303754246285414222822801609492690060532771454976000
• The square root of 640942421991845760 is 800588797.0686610599
• The cube root of 640942421991845760 is 862196.6657714377

Scales and comparisons

• 640,942,421,991,845,760 seconds is equal to 20,379,986,454 years, 13 weeks, 3 days, 1 hour, 36 minutes.
• To count from 1 to 640,942,421,991,845,760 would take you about sixty-one billion, one hundred thirty-nine million, nine hundred fifty-nine thousand, three hundred sixty-two 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 640942421991845760 cubic inches would be around 71849.7 feet tall.

Recreational maths with 640942421991845760

• 640942421991845760 backwards is 067548199124249046
• The number of decimal digits it has is: 18
• The sum of 640942421991845760's digits is 81
• More coming soon!