256640752464514 has 32 divisors (see below), whose sum is σ = 444542121397440. Its totient is φ = 110012949211200.

The previous prime is 256640752464479. The next prime is 256640752464541. The reversal of 256640752464514 is 415464257046652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4677393877 + ... + 4677448744.

It is an arithmetic number, because the mean of its divisors is an integer number (13891941293670).

Almost surely, 2^{256640752464514} is an apocalyptic number.

256640752464514 is a deficient number, since it is larger than the sum of its proper divisors (187901368932926).

256640752464514 is a wasteful number, since it uses less digits than its factorization.

256640752464514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9354842706.

The product of its (nonzero) digits is 193536000, while the sum is 61.

The spelling of 256640752464514 in words is "two hundred fifty-six trillion, six hundred forty billion, seven hundred fifty-two million, four hundred sixty-four thousand, five hundred fourteen".