64156879086317 has 16 divisors (see below), whose sum is σ = 68661486871344. Its totient is φ = 59734469760000.

The previous prime is 64156879086271. The next prime is 64156879086329. The reversal of 64156879086317 is 71368097865146.

It can be written as a sum of positive squares in 8 ways, for example, as 15358984254916 + 48797894831401 = 3919054^2 + 6985549^2 .

It is a cyclic number.

It is not a de Polignac number, because 64156879086317 - 2²⁴ = 64156862309101 is a prime.

It is a super-2 number, since 2×64156879086317² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64156879086337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13791734 + ... + 17847287.

It is an arithmetic number, because the mean of its divisors is an integer number (4291342929459).

Almost surely, 2^{64156879086317} is an apocalyptic number.

It is an amenable number.

64156879086317 is a deficient number, since it is larger than the sum of its proper divisors (4504607785027).

64156879086317 is a wasteful number, since it uses less digits than its factorization.

64156879086317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31640320.

The product of its (nonzero) digits is 365783040, while the sum is 71.

The spelling of 64156879086317 in words is "sixty-four trillion, one hundred fifty-six billion, eight hundred seventy-nine million, eighty-six thousand, three hundred seventeen".