256807296968 has 32 divisors (see below), whose sum is σ = 489545512320. Its totient is φ = 126263016000.

The previous prime is 256807296913. The next prime is 256807296989. The reversal of 256807296968 is 869692708652.

It is a junction number, because it is equal to n+sod(n) for n = 256807296898 and 256807296907.

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, 1699463 + ... + 1844393.

It is an arithmetic number, because the mean of its divisors is an integer number (15298297260).

Almost surely, 2^256807296968 is an apocalyptic number.

It is an amenable number.

256807296968 is a deficient number, since it is larger than the sum of its proper divisors (232738215352).

256807296968 is a wasteful number, since it uses less digits than its factorization.

256807296968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148629 (or 148625 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 68.

The spelling of 256807296968 in words is "two hundred fifty-six billion, eight hundred seven million, two hundred ninety-six thousand, nine hundred sixty-eight".