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68276971455280 = 2457222303780953
BaseRepresentation
bin11111000011000111110001…
…01000010100001100110000
322221202012210112102122222221
433201203320220110030300
532422122214143032110
6401114001354010424
720244564000453100
oct1741437050241460
9287665715378887
1068276971455280
111a8341124560a5
1277a864b716a14
132c1364c329613
1412c08a1919200
157d60926297da
hex3e18f8a14330

68276971455280 has 120 divisors (see below), whose sum is σ = 184669855765632. Its totient is φ = 23408167781376.

The previous prime is 68276971455263. The next prime is 68276971455289. The reversal of 68276971455280 is 8255417967286.

It is a super-2 number, since 2×682769714552802 (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is not an unprimeable number, because it can be changed into a prime (68276971455289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87037284 + ... + 87818236.

Almost surely, 268276971455280 is an apocalyptic number.

It is an amenable number.

68276971455280 is an abundant number, since it is smaller than the sum of its proper divisors (116392884310352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68276971455280 is a wasteful number, since it uses less digits than its factorization.

68276971455280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803283 (or 803270 counting only the distinct ones).

The product of its (nonzero) digits is 406425600, while the sum is 70.

The spelling of 68276971455280 in words is "sixty-eight trillion, two hundred seventy-six billion, nine hundred seventy-one million, four hundred fifty-five thousand, two hundred eighty".

Divisors: 1 2 4 5 7 8 10 14 16 20 28 35 40 49 56 70 80 98 112 140 196 245 280 392 490 560 784 980 1960 3920 22303 44606 89212 111515 156121 178424 223030 312242 356848 446060 624484 780605 780953 892120 1092847 1248968 1561210 1561906 1784240 2185694 2497936 3122420 3123812 3904765 4371388 5464235 5466671 6244840 6247624 7809530 8742776 10928470 10933342 12489680 12495248 15619060 17485552 21856940 21866684 27333355 31238120 38266697 43713880 43733368 54666710 62476240 76533394 87427760 87466736 109333420 153066788 191333485 218666840 306133576 382666970 437333680 612267152 765333940 1530667880 3061335760 17417594759 34835189518 69670379036 87087973795 121923163313 139340758072 174175947590 243846326626 278681516144 348351895180 487692653252 609615816565 696703790360 853462143191 975385306504 1219231633130 1393407580720 1706924286382 1950770613008 2438463266260 3413848572764 4267310715955 4876926532520 6827697145528 8534621431910 9753853065040 13655394291056 17069242863820 34138485727640 68276971455280