256510571066511 has 8 divisors (see below), whose sum is σ = 342755990841264. Its totient is φ = 170636099334720.

The previous prime is 256510571066501. The next prime is 256510571066527. The reversal of 256510571066511 is 115660175015652.

256510571066511 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256510571066511 - 2⁹ = 256510571065999 is a prime.

It is a super-3 number, since 3×256510571066511³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256510571066501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92737009126 + ... + 92737011891.

It is an arithmetic number, because the mean of its divisors is an integer number (42844498855158).

Almost surely, 2^{256510571066511} is an apocalyptic number.

256510571066511 is a deficient number, since it is larger than the sum of its proper divisors (86245419774753).

256510571066511 is a wasteful number, since it uses less digits than its factorization.

256510571066511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185474021481.

The product of its (nonzero) digits is 1890000, while the sum is 51.

The spelling of 256510571066511 in words is "two hundred fifty-six trillion, five hundred ten billion, five hundred seventy-one million, sixty-six thousand, five hundred eleven".