256515705012404 has 36 divisors (see below), whose sum is σ = 450444501017280. Its totient is φ = 127818697760880.

The previous prime is 256515705012397. The next prime is 256515705012461. The reversal of 256515705012404 is 404210507515652.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 722119067 + ... + 722474205.

It is an arithmetic number, because the mean of its divisors is an integer number (12512347250480).

Almost surely, 2^{256515705012404} is an apocalyptic number.

It is an amenable number.

256515705012404 is a deficient number, since it is larger than the sum of its proper divisors (193928796004876).

256515705012404 is a wasteful number, since it uses less digits than its factorization.

256515705012404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357140 (or 356755 counting only the distinct ones).

The product of its (nonzero) digits is 1680000, while the sum is 47.

The spelling of 256515705012404 in words is "two hundred fifty-six trillion, five hundred fifteen billion, seven hundred five million, twelve thousand, four hundred four".