256717882676 has 12 divisors (see below), whose sum is σ = 449265116160. Its totient is φ = 128356420920.

The previous prime is 256717882639. The next prime is 256717882711. The reversal of 256717882676 is 676288717652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390836 + ... + 816203.

It is an arithmetic number, because the mean of its divisors is an integer number (37438759680).

Almost surely, 2^256717882676 is an apocalyptic number.

It is an amenable number.

256717882676 is a deficient number, since it is larger than the sum of its proper divisors (192547233484).

256717882676 is a wasteful number, since it uses less digits than its factorization.

256717882676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260214 (or 1260212 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 65.

The spelling of 256717882676 in words is "two hundred fifty-six billion, seven hundred seventeen million, eight hundred eighty-two thousand, six hundred seventy-six".