256164042315 has 24 divisors (see below), whose sum is σ = 421239253680. Its totient is φ = 132928357248.

The previous prime is 256164042289. The next prime is 256164042371. The reversal of 256164042315 is 513240461652.

It is not a de Polignac number, because 256164042315 - 2⁷ = 256164042187 is a prime.

It is a super-2 number, since 2×256164042315² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6216720 + ... + 6257789.

It is an arithmetic number, because the mean of its divisors is an integer number (17551635570).

Almost surely, 2^256164042315 is an apocalyptic number.

256164042315 is a deficient number, since it is larger than the sum of its proper divisors (165075211365).

256164042315 is a wasteful number, since it uses less digits than its factorization.

256164042315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12474591 (or 12474554 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 256164042315 in words is "two hundred fifty-six billion, one hundred sixty-four million, forty-two thousand, three hundred fifteen".