642647009979

Names of 642647009979

• Cardinal: 642647009979 can be written as Six hundred forty-two billion, six hundred forty-seven million, nine thousand, nine hundred seventy-nine.

Scientific notation

• Scientific notation: 6.42647009979 × 10¹¹

Factors of 642647009979

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1047

Divisors of 642647009979

• Number of divisors d(n): 192
• Complete list of divisors:
  1 3 9 13 19 31 39 57 93 97 117 127 171 247 279 291 381 403 589 741 757 873 1143 1209 1261 1651 1767 1843 2223 2271 2413 3007 3627 3783 3937 4953 5301 5529 6813 7239 7657 9021 9841 11349 11811 12319 14383 14859 16587 21717 22971 23467 23959 27063 29523 31369 35433 36957 39091 43149 51181 57133 68913 70401 71877 73429 74803 88569 94107 96139 110871 117273 129447 153543 160147 171399 186979 211203 215631 220287 224409 234061 282321 288417 305071 351819 381889 445873 460629 480441 514197 560937 660861 673227 702183 742729 865251 915213 954577 972439 1145667 1249807 1337619 1395151 1441323 1682811 1826641 2106549 2228187 2276299 2745639 2863731 2917317 2980309 3042793 3437001 3749421 4012857 4185453 4964557 5479923 5796349 6684561 6828897 7255891 8591193 8751951 8940927 9128379 9325483 11248263 12556359 14893671 16439769 17389047 18136963 20486691 21767673 23746333 26822781 27385137 27976449 29591887 38744017 43249681 44681013 52167141 54410889 56625871 65303019 71238999 83929347 88775661 94326583 116232051 121231279 129749043 163232667 169877613 177184177 213716997 266326983 282979749 289089973 348696153 363693837 389247129 509632839 531552531 562245853 736136323 848939247 867269919 1091081511 1594657593 1686737559 2208408969 2303394301 2601809757 3758169649 5060212677 5492709487 6625226907 6910182903 11274508947 16478128461 20730548709 33823526841 49434385383 71405223331 214215669993 642647009979
• Sum of all divisors σ(n): 1107532840960
• Sum of proper divisors (its aliquot sum) s(n): 464885830981
• 642647009979 is a deficient number, because the sum of its proper divisors (464885830981) is less than itself. Its deficiency is 177761178998

Bases of 642647009979

• Binary: 1001010110100000101111110010101010111011₂
• Hexadecimal: 0x95A0BF2ABB
• Base-36: 8787FQGR

Squares and roots of 642647009979

• 642647009979 squared (642647009979²) is 412995179434948925580441
• 642647009979 cubed (642647009979³) is 265410117199610517758848995694220739
• The square root of 642647009979 is 801652.6741544619
• The cube root of 642647009979 is 8629.6032725323

Scales and comparisons

• 642,647,009,979 seconds is equal to 20,434 years, 9 weeks, 5 days, 2 hours, 19 minutes, 39 seconds.
• To count from 1 to 642,647,009,979 would take you about forty thousand, eight hundred sixty-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 642647009979 cubic inches would be around 719.1 feet tall.

Recreational maths with 642647009979

• 642647009979 backwards is 979900746246
• The number of decimal digits it has is: 12
• The sum of 642647009979's digits is 63
• More coming soon!