256628759 has 2 divisors, whose sum is σ = 256628760. Its totient is φ = 256628758.

The previous prime is 256628747. The next prime is 256628761. The reversal of 256628759 is 957826652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256628759 - 2²⁴ = 239851543 is a prime.

Together with 256628761, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256624759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128314379 + 128314380.

It is an arithmetic number, because the mean of its divisors is an integer number (128314380).

Almost surely, 2^256628759 is an apocalyptic number.

256628759 is a deficient number, since it is larger than the sum of its proper divisors (1).

256628759 is an equidigital number, since it uses as much as digits as its factorization.

256628759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 50.

The square root of 256628759 is about 16019.6366687887. The cubic root of 256628759 is about 635.4798357227.

The spelling of 256628759 in words is "two hundred fifty-six million, six hundred twenty-eight thousand, seven hundred fifty-nine".