256385623924 has 24 divisors (see below), whose sum is σ = 453162993696. Its totient is φ = 126910740000.

The previous prime is 256385623873. The next prime is 256385623937. The reversal of 256385623924 is 429326583652.

It is a happy number.

It is a super-2 number, since 2×256385623924² (a number of 24 digits) contains 22 as substring.

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, 4907259 + ... + 4959229.

It is an arithmetic number, because the mean of its divisors is an integer number (18881791404).

Almost surely, 2^256385623924 is an apocalyptic number.

It is an amenable number.

256385623924 is a deficient number, since it is larger than the sum of its proper divisors (196777369772).

256385623924 is a wasteful number, since it uses less digits than its factorization.

256385623924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64287 (or 64285 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 55.

The spelling of 256385623924 in words is "two hundred fifty-six billion, three hundred eighty-five million, six hundred twenty-three thousand, nine hundred twenty-four".