640155639168

Names of 640155639168

• Cardinal: 640155639168 can be written as Six hundred forty billion, one hundred fifty-five million, six hundred thirty-nine thousand, one hundred sixty-eight.

Scientific notation

• Scientific notation: 6.40155639168 × 10¹¹

Factors of 640155639168

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 61830

Divisors of 640155639168

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 48 64 71 72 96 127 128 142 144 192 213 254 284 288 381 384 426 508 568 576 639 762 852 1016 1136 1143 1152 1278 1524 1704 2032 2272 2286 2556 3048 3408 4064 4544 4572 5112 6096 6816 8128 9017 9088 9144 10224 12192 13632 16256 18034 18288 20448 24384 27051 27264 36068 36576 40896 48768 54102 61627 72136 73152 81153 81792 108204 123254 144272 146304 162306 184881 216408 246508 288544 324612 369762 432816 493016 554643 577088 649224 739524 865632 986032 1109286 1154176 1298448 1479048 1731264 1972064 2218572 2596896 2958096 3462528 3944128 4375517 4437144 5193792 5916192 7826629 7888256 8751034 8874288 10387584 11832384 13126551 15653258 17502068 17748576 23479887 23664768 26253102 31306516 35004136 35497152 39379653 46959774 52506204 62613032 70008272 70439661 70994304 78759306 93919548 105012408 125226064 140016544 140879322 157518612 187839096 210024816 250452128 280033088 281758644 315037224 375678192 420049632 500904256 555690659 560066176 563517288 630074448 751356384 840099264 1001808512 1111381318 1127034576 1260148896 1502712768 1667071977 1680198528 2222762636 2254069152 2520297792 3005425536 3334143954 4445525272 4508138304 5001215931 5040595584 6668287908 8891050544 9016276608 10002431862 13336575816 17782101088 20004863724 26673151632 35564202176 40009727448 53346303264 71128404352 80019454896 106692606528 160038909792 213385213056 320077819584 640155639168
• Sum of all divisors σ(n): 1882799493120
• Sum of proper divisors (its aliquot sum) s(n): 1242643853952
• 640155639168 is an abundant number, because the sum of its proper divisors (1242643853952) is greater than itself. Its abundance is 602488214784

Bases of 640155639168

• Binary: 1001010100001100001111111101110110000000₂
• Hexadecimal: 0x950C3FDD80
• Base-36: 863050G0

Squares and roots of 640155639168

• 640155639168 squared (640155639168²) is 409799242358590615732224
• 640155639168 cubed (640155639168³) is 262335295922625715469708531054149632
• The square root of 640155639168 is 800097.2685667661
• The cube root of 640155639168 is 8618.4372752215

Scales and comparisons

• 640,155,639,168 seconds is equal to 20,354 years, 50 weeks, 2 days, 18 hours, 52 minutes, 48 seconds.
• To count from 1 to 640,155,639,168 would take you about forty thousand, seven hundred nine 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 640155639168 cubic inches would be around 718.2 feet tall.

Recreational maths with 640155639168

• 640155639168 backwards is 861936551046
• The number of decimal digits it has is: 12
• The sum of 640155639168's digits is 54
• More coming soon!