256510107706767 has 16 divisors (see below), whose sum is σ = 343907346531840. Its totient is φ = 170059827261600.

The previous prime is 256510107706763. The next prime is 256510107706777. The reversal of 256510107706767 is 767607701015652.

It is not a de Polignac number, because 256510107706767 - 2² = 256510107706763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256510107706767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256510107706763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41205342 + ... + 47020212.

It is an arithmetic number, because the mean of its divisors is an integer number (21494209158240).

Almost surely, 2^{256510107706767} is an apocalyptic number.

256510107706767 is a deficient number, since it is larger than the sum of its proper divisors (87397238825073).

256510107706767 is a wasteful number, since it uses less digits than its factorization.

256510107706767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5896294.

The product of its (nonzero) digits is 25930800, while the sum is 60.

The spelling of 256510107706767 in words is "two hundred fifty-six trillion, five hundred ten billion, one hundred seven million, seven hundred six thousand, seven hundred sixty-seven".