640642550625

Names of 640642550625

• Cardinal: 640642550625 can be written as Six hundred forty billion, six hundred forty-two million, five hundred fifty thousand, six hundred twenty-five.

Scientific notation

• Scientific notation: 6.40642550625 × 10¹¹

Factors of 640642550625

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 105

Divisors of 640642550625

• Number of divisors d(n): 320
• Complete list of divisors:
  1 3 5 7 9 11 15 21 25 27 33 35 45 55 63 75 77 79 99 105 125 135 165 175 189 225 231 237 275 297 315 375 385 395 495 525 553 625 675 693 711 825 869 875 945 1125 1155 1185 1375 1485 1575 1659 1875 1925 1975 2079 2133 2475 2607 2625 2765 3375 3465 3555 4125 4345 4375 4725 4977 5625 5775 5925 6083 6241 6875 7425 7821 7875 8295 9625 9875 10395 10665 12375 13035 13125 13825 14931 16875 17325 17775 18249 18723 20625 21725 23463 23625 24885 28875 29625 30415 31205 37125 39105 39375 41475 43687 48125 49375 51975 53325 54747 56169 61875 65175 68651 69125 74655 86625 88875 91245 93615 108625 117315 118125 124425 131061 144375 148125 152075 156025 164241 168507 185625 195525 205953 207375 218435 259875 266625 273735 280845 325875 343255 345625 373275 393183 433125 444375 456225 468075 480557 493039 543125 586575 617859 622125 655305 760375 780125 821205 842535 977625 1029765 1036875 1092175 1179549 1299375 1333125 1368675 1404225 1441671 1479117 1629375 1716275 1853577 1866375 1965915 2281125 2340375 2402785 2465195 2932875 3089295 3110625 3276525 3451273 3801875 3900625 4106025 4212675 4325013 4437351 4888125 5148825 5423429 5460875 5897745 6843375 7021125 7208355 7395585 8581375 9267885 9331875 9829575 10353819 11405625 11701875 12013925 12325975 12975039 13312053 14664375 15446475 16270287 16382625 17256365 20530125 21063375 21625065 22186755 25744125 27117145 27304375 29488725 31061457 34216875 35105625 36041775 36977925 37964003 42906875 46339425 48810861 49147875 51769095 60069625 61629875 64875195 66560265 77232375 81351435 81913125 86281825 93184371 102650625 105316875 108125325 110933775 113892009 128720625 135585725 146432583 147443625 155307285 180208875 184889625 189820015 231697125 244054305 245739375 258845475 300348125 308149375 324375975 332801325 341676027 386161875 406757175 431409125 465921855 540626625 554668875 569460045 677928625 732162915 737218125 776536425 901044375 924448125 949100075 1025028081 1158485625 1220271525 1294227375 1621879875 1664006625 1708380135 2033785875 2157045625 2329609275 2703133125 2773344375 2847300225 3389643125 3660814575 3882682125 4745500375 5125140405 6101357625 6471136875 8109399375 8320033125 8541900675 10168929375 11648046375 14236501125 18304072875 19413410625 23727501875 25625702025 30506788125 42709503375 58240231875 71182505625 91520364375 128128510125 213547516875 640642550625
• Sum of all divisors σ(n): 1497600614400
• Sum of proper divisors (its aliquot sum) s(n): 856958063775
• 640642550625 is an abundant number, because the sum of its proper divisors (856958063775) is greater than itself. Its abundance is 216315513150

Bases of 640642550625

• Binary: 1001010100101001010001011000101101100001₂
• Hexadecimal: 0x9529458B61
• Base-36: 86B217Q9

Squares and roots of 640642550625

• 640642550625 squared (640642550625²) is 410422877671305687890625
• 640642550625 cubed (640642550625³) is 262934359186197636264320176025390625
• The square root of 640642550625 is 800401.4933925349
• The cube root of 640642550625 is 8620.6218233177

Scales and comparisons

• 640,642,550,625 seconds is equal to 20,370 years, 23 weeks, 3 days, 8 hours, 3 minutes, 45 seconds.
• To count from 1 to 640,642,550,625 would take you about forty thousand, seven hundred forty 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 640642550625 cubic inches would be around 718.4 feet tall.

Recreational maths with 640642550625

• 640642550625 backwards is 526055246046
• 640642550625 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 640642550625's digits is 45
• More coming soon!