256610659 has 2 divisors, whose sum is σ = 256610660. Its totient is φ = 256610658.

The previous prime is 256610623. The next prime is 256610681. The reversal of 256610659 is 956016652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256610659 - 2⁹ = 256610147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256610689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128305329 + 128305330.

It is an arithmetic number, because the mean of its divisors is an integer number (128305330).

Almost surely, 2^256610659 is an apocalyptic number.

256610659 is a deficient number, since it is larger than the sum of its proper divisors (1).

256610659 is an equidigital number, since it uses as much as digits as its factorization.

256610659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 256610659 is about 16019.0717271632. The cubic root of 256610659 is about 635.4648952623.

It can be divided in two parts, 2566 and 10659, that added together give a square (13225 = 115²).

The spelling of 256610659 in words is "two hundred fifty-six million, six hundred ten thousand, six hundred fifty-nine".