256684118908 has 24 divisors (see below), whose sum is σ = 529928505344. Its totient is φ = 106458850800.

The previous prime is 256684118849. The next prime is 256684118917. The reversal of 256684118908 is 809811486652.

It is a happy number.

It is a super-2 number, since 2×256684118908² (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, 147858648 + ... + 147860383.

Almost surely, 2^256684118908 is an apocalyptic number.

256684118908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256684118908 is an abundant number, since it is smaller than the sum of its proper divisors (273244386436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256684118908 is a wasteful number, since it uses less digits than its factorization.

256684118908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295719073 (or 295719071 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 58.

The spelling of 256684118908 in words is "two hundred fifty-six billion, six hundred eighty-four million, one hundred eighteen thousand, nine hundred eight".