256946381315 has 16 divisors (see below), whose sum is σ = 332076513888. Its totient is φ = 189732032256.

The previous prime is 256946381303. The next prime is 256946381369. The reversal of 256946381315 is 513183649652.

It is a de Polignac number, because none of the positive numbers 2^k-256946381315 is a prime.

It is a super-2 number, since 2×256946381315² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879764 + ... + 1134846.

It is an arithmetic number, because the mean of its divisors is an integer number (20754782118).

Almost surely, 2^256946381315 is an apocalyptic number.

256946381315 is a deficient number, since it is larger than the sum of its proper divisors (75130132573).

256946381315 is a wasteful number, since it uses less digits than its factorization.

256946381315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270598.

The product of its digits is 4665600, while the sum is 53.

The spelling of 256946381315 in words is "two hundred fifty-six billion, nine hundred forty-six million, three hundred eighty-one thousand, three hundred fifteen".