256776312746 has 16 divisors (see below), whose sum is σ = 392013172800. Its totient is φ = 126108816288.

The previous prime is 256776312721. The next prime is 256776312769. The reversal of 256776312746 is 647213677652.

It is a junction number, because it is equal to n+sod(n) for n = 256776312691 and 256776312700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745331 + ... + 1033958.

It is an arithmetic number, because the mean of its divisors is an integer number (24500823300).

Almost surely, 2^256776312746 is an apocalyptic number.

256776312746 is a deficient number, since it is larger than the sum of its proper divisors (135236860054).

256776312746 is a wasteful number, since it uses less digits than its factorization.

256776312746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780573.

The product of its digits is 17781120, while the sum is 56.

The spelling of 256776312746 in words is "two hundred fifty-six billion, seven hundred seventy-six million, three hundred twelve thousand, seven hundred forty-six".