256510117364075 has 6 divisors (see below), whose sum is σ = 318072545531484. Its totient is φ = 205208093891240.

The previous prime is 256510117363987. The next prime is 256510117364113. The reversal of 256510117364075 is 570463711015652.

It is not a de Polignac number, because 256510117364075 - 2²⁰ = 256510116315499 is a prime.

It is a super-2 number, since 2×256510117364075² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5130202347257 + ... + 5130202347306.

It is an arithmetic number, because the mean of its divisors is an integer number (53012090921914).

Almost surely, 2^{256510117364075} is an apocalyptic number.

256510117364075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256510117364075 is a deficient number, since it is larger than the sum of its proper divisors (61562428167409).

256510117364075 is a wasteful number, since it uses less digits than its factorization.

256510117364075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10260404694573 (or 10260404694568 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 53.

The spelling of 256510117364075 in words is "two hundred fifty-six trillion, five hundred ten billion, one hundred seventeen million, three hundred sixty-four thousand, seventy-five".