256842707623486 has 16 divisors (see below), whose sum is σ = 394257418354800. Its totient is φ = 125424079195968.

The previous prime is 256842707623433. The next prime is 256842707623507. The reversal of 256842707623486 is 684326707248652.

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, 126744901 + ... + 128755408.

It is an arithmetic number, because the mean of its divisors is an integer number (24641088647175).

Almost surely, 2^{256842707623486} is an apocalyptic number.

256842707623486 is a deficient number, since it is larger than the sum of its proper divisors (137414710731314).

256842707623486 is a wasteful number, since it uses less digits than its factorization.

256842707623486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255512043.

The product of its (nonzero) digits is 1300561920, while the sum is 70.

The spelling of 256842707623486 in words is "two hundred fifty-six trillion, eight hundred forty-two billion, seven hundred seven million, six hundred twenty-three thousand, four hundred eighty-six".