256055965 has 12 divisors (see below), whose sum is σ = 337740732. Its totient is φ = 186222080.

The previous prime is 256055909. The next prime is 256055971. The reversal of 256055965 is 569550652.

It can be written as a sum of positive squares in 2 ways, for example, as 181872196 + 74183769 = 13486^2 + 8613^2 .

It is a de Polignac number, because none of the positive numbers 2^k-256055965 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211012 + ... + 212221.

It is an arithmetic number, because the mean of its divisors is an integer number (28145061).

Almost surely, 2^256055965 is an apocalyptic number.

It is an amenable number.

256055965 is a deficient number, since it is larger than the sum of its proper divisors (81684767).

256055965 is a wasteful number, since it uses less digits than its factorization.

256055965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423260 (or 423249 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 43.

The square root of 256055965 is about 16001.7488106769. The cubic root of 256055965 is about 635.0066876763.

The spelling of 256055965 in words is "two hundred fifty-six million, fifty-five thousand, nine hundred sixty-five".