638401939425

Names of 638401939425

• Cardinal: 638401939425 can be written as Six hundred thirty-eight billion, four hundred one million, nine hundred thirty-nine thousand, four hundred twenty-five.

Scientific notation

• Scientific notation: 6.38401939425 × 10¹¹

Factors of 638401939425

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 5134

Divisors of 638401939425

• Number of divisors d(n): 168
• Complete list of divisors:
  1 3 5 9 15 19 25 27 45 57 75 81 95 135 171 225 243 285 361 405 475 513 675 729 855 1083 1215 1425 1539 1805 2025 2565 3249 3645 4275 4617 5107 5415 6075 6859 7695 9025 9747 12825 13851 15321 16245 18225 20577 23085 25535 27075 29241 34295 38475 45963 48735 61731 69255 76605 81225 87723 97033 102885 115425 127675 137889 146205 171475 185193 229815 243675 263169 291099 308655 346275 383025 413667 438615 485165 514425 555579 689445 731025 873297 925965 1149075 1241001 1315845 1455495 1543275 1666737 1843627 2068335 2193075 2425825 2619891 2777895 3447225 3723003 4366485 4629825 5000211 5530881 6205005 6579225 7277475 7859673 8333685 9218135 10341675 13099455 13889475 16592643 18615015 21832425 23579019 25001055 27654405 31025025 35028913 39298365 41668425 46090675 49777929 65497275 70737057 82963215 93075075 105086739 117895095 125005275 138272025 149333787 175144565 196491825 248889645 315260217 353685285 414816075 448001361 525433695 589475475 746668935 875722825 945780651 1244448225 1344004083 1576301085 1768426425 2240006805 2627168475 2837341953 3733344675 4728903255 6720020415 7881505425 8512025859 11200034025 14186709765 23644516275 25536077577 33600102075 42560129295 70933548825 127680387885 212800646475 638401939425
• Sum of all divisors σ(n): 1253058395360
• Sum of proper divisors (its aliquot sum) s(n): 614656455935
• 638401939425 is a deficient number, because the sum of its proper divisors (614656455935) is less than itself. Its deficiency is 23745483490

Bases of 638401939425

• Binary: 1001010010100011101110001000011111100001₂
• Hexadecimal: 0x94A3B887E1
• Base-36: 85A01529

Squares and roots of 638401939425

• 638401939425 squared (638401939425²) is 407557036261601369330625
• 638401939425 cubed (638401939425³) is 260185202375711365836906714047390625
• The square root of 638401939425 is 799000.5878752531
• The cube root of 638401939425 is 8610.5600377499

Scales and comparisons

• 638,401,939,425 seconds is equal to 20,299 years, 10 weeks, 5 days, 8 hours, 3 minutes, 45 seconds.
• To count from 1 to 638,401,939,425 would take you about forty thousand, five hundred ninety-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 638401939425 cubic inches would be around 717.5 feet tall.

Recreational maths with 638401939425

• 638401939425 backwards is 524939104836
• The number of decimal digits it has is: 12
• The sum of 638401939425's digits is 54
• More coming soon!