256626465265 has 16 divisors (see below), whose sum is σ = 310024849536. Its totient is φ = 203919408000.

The previous prime is 256626465229. The next prime is 256626465323. The reversal of 256626465265 is 562564626652.

It is not a de Polignac number, because 256626465265 - 2¹⁵ = 256626432497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13195989 + ... + 13215421.

It is an arithmetic number, because the mean of its divisors is an integer number (19376553096).

Almost surely, 2^256626465265 is an apocalyptic number.

It is an amenable number.

256626465265 is a deficient number, since it is larger than the sum of its proper divisors (53398384271).

256626465265 is a wasteful number, since it uses less digits than its factorization.

256626465265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37080.

The product of its digits is 31104000, while the sum is 55.

The spelling of 256626465265 in words is "two hundred fifty-six billion, six hundred twenty-six million, four hundred sixty-five thousand, two hundred sixty-five".