256551342376 has 32 divisors (see below), whose sum is σ = 549875773440. Its totient is φ = 109925995968.

The previous prime is 256551342323. The next prime is 256551342403. The reversal of 256551342376 is 673243155652.

It is a happy 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, 258216 + ... + 761431.

It is an arithmetic number, because the mean of its divisors is an integer number (17183617920).

Almost surely, 2^256551342376 is an apocalyptic number.

It is an amenable number.

256551342376 is an abundant number, since it is smaller than the sum of its proper divisors (293324431064).

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

256551342376 is a wasteful number, since it uses less digits than its factorization.

256551342376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024153 (or 1024149 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 49.

The spelling of 256551342376 in words is "two hundred fifty-six billion, five hundred fifty-one million, three hundred forty-two thousand, three hundred seventy-six".