256331680518 has 8 divisors (see below), whose sum is σ = 512663361048. Its totient is φ = 85443893504.

The previous prime is 256331680513. The next prime is 256331680541. The reversal of 256331680518 is 815086133652.

It is a sphenic number, since it is the product of 3 distinct primes.

256331680518 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256331680513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21360973371 + ... + 21360973382.

It is an arithmetic number, because the mean of its divisors is an integer number (64082920131).

Almost surely, 2^256331680518 is an apocalyptic number.

256331680518 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256331680518 is a wasteful number, since it uses less digits than its factorization.

256331680518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42721946758.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 256331680518 in words is "two hundred fifty-six billion, three hundred thirty-one million, six hundred eighty thousand, five hundred eighteen".