256942688836 has 24 divisors (see below), whose sum is σ = 454059837504. Its totient is φ = 127211552160.

The previous prime is 256942688777. The next prime is 256942688837. The reversal of 256942688836 is 638886249652.

It is not an unprimeable number, because it can be changed into a prime (256942688837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5287731 + ... + 5336101.

It is an arithmetic number, because the mean of its divisors is an integer number (18919159896).

Almost surely, 2^256942688836 is an apocalyptic number.

It is an amenable number.

256942688836 is a deficient number, since it is larger than the sum of its proper divisors (197117148668).

256942688836 is a wasteful number, since it uses less digits than its factorization.

256942688836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61371 (or 61369 counting only the distinct ones).

The product of its digits is 238878720, while the sum is 67.

The spelling of 256942688836 in words is "two hundred fifty-six billion, nine hundred forty-two million, six hundred eighty-eight thousand, eight hundred thirty-six".