256669000259 has 16 divisors (see below), whose sum is σ = 301321122816. Its totient is φ = 214015413600.

The previous prime is 256669000171. The next prime is 256669000309. The reversal of 256669000259 is 952000966652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256669000259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256669000759) by changing a digit.

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, 1315394 + ... + 1497864.

It is an arithmetic number, because the mean of its divisors is an integer number (18832570176).

Almost surely, 2^256669000259 is an apocalyptic number.

256669000259 is a deficient number, since it is larger than the sum of its proper divisors (44652122557).

256669000259 is a wasteful number, since it uses less digits than its factorization.

256669000259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187946.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 256669000259 in words is "two hundred fifty-six billion, six hundred sixty-nine million, two hundred fifty-nine", and thus it is an aban number.