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68626740365 = 5211103362971
BaseRepresentation
bin111111111010011110…
…001111010010001101
320120010201022121210122
4333322132033102031
52111021421142430
651305433114325
74646430445151
oct777236172215
9216121277718
1068626740365
1127117007857
1211372b589a5
136618a9c2a1
1434704a5061
151bb9c9dee5
hexffa78f48d

68626740365 has 16 divisors (see below), whose sum is σ = 82823797056. Its totient is φ = 54587433600.

The previous prime is 68626740353. The next prime is 68626740373. The reversal of 68626740365 is 56304762686.

It is not a de Polignac number, because 68626740365 - 214 = 68626723981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1058330 + ... + 1121300.

It is an arithmetic number, because the mean of its divisors is an integer number (5176487316).

Almost surely, 268626740365 is an apocalyptic number.

It is an amenable number.

68626740365 is a deficient number, since it is larger than the sum of its proper divisors (14197056691).

68626740365 is a wasteful number, since it uses less digits than its factorization.

68626740365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64220.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 68626740365 in words is "sixty-eight billion, six hundred twenty-six million, seven hundred forty thousand, three hundred sixty-five".

Divisors: 1 5 211 1033 1055 5165 62971 217963 314855 1089815 13286881 65049043 66434405 325245215 13725348073 68626740365