256931427092 has 24 divisors (see below), whose sum is σ = 450867128040. Its totient is φ = 128112399360.

The previous prime is 256931427037. The next prime is 256931427131. The reversal of 256931427092 is 290724139652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51872795536 + 205058631556 = 227756^2 + 452834^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256931427092.

It is a congruent number.

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, 7874492 + ... + 7907052.

It is an arithmetic number, because the mean of its divisors is an integer number (18786130335).

Almost surely, 2^256931427092 is an apocalyptic number.

It is an amenable number.

256931427092 is a deficient number, since it is larger than the sum of its proper divisors (193935700948).

256931427092 is a wasteful number, since it uses less digits than its factorization.

256931427092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37931 (or 37929 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 256931427092 in words is "two hundred fifty-six billion, nine hundred thirty-one million, four hundred twenty-seven thousand, ninety-two".