256670259 has 16 divisors (see below), whose sum is σ = 360729600. Its totient is φ = 161886816.

The previous prime is 256670251. The next prime is 256670261. The reversal of 256670259 is 952076652.

It is not a de Polignac number, because 256670259 - 2³ = 256670251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256670259.

It is not an unprimeable number, because it can be changed into a prime (256670251) 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, 45982 + ... + 51260.

It is an arithmetic number, because the mean of its divisors is an integer number (22545600).

Almost surely, 2^256670259 is an apocalyptic number.

256670259 is a deficient number, since it is larger than the sum of its proper divisors (104059341).

256670259 is a wasteful number, since it uses less digits than its factorization.

256670259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6154.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 256670259 is about 16020.9319017341. The cubic root of 256670259 is about 635.5140888229.

The spelling of 256670259 in words is "two hundred fifty-six million, six hundred seventy thousand, two hundred fifty-nine".