256518632376 has 96 divisors (see below), whose sum is σ = 720690974640. Its totient is φ = 85479867648.

The previous prime is 256518632309. The next prime is 256518632387. The reversal of 256518632376 is 673236815652.

256518632376 is a `hidden beast` number, since 2 + 5 + 65 + 186 + 32 + 376 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6896260 + ... + 6933356.

Almost surely, 2^256518632376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256518632376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360345487320).

256518632376 is an abundant number, since it is smaller than the sum of its proper divisors (464172342264).

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

256518632376 is a wasteful number, since it uses less digits than its factorization.

256518632376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40675 (or 40659 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 256518632376 in words is "two hundred fifty-six billion, five hundred eighteen million, six hundred thirty-two thousand, three hundred seventy-six".