256718967 has 16 divisors (see below), whose sum is σ = 353912832. Its totient is φ = 165353760.

The previous prime is 256718941. The next prime is 256718981. The reversal of 256718967 is 769817652.

It is not a de Polignac number, because 256718967 - 2¹⁴ = 256702583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256718767) 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, 65713 + ... + 69509.

It is an arithmetic number, because the mean of its divisors is an integer number (22119552).

Almost surely, 2^256718967 is an apocalyptic number.

256718967 is a deficient number, since it is larger than the sum of its proper divisors (97193865).

256718967 is a wasteful number, since it uses less digits than its factorization.

256718967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4558.

The product of its digits is 1270080, while the sum is 51.

The square root of 256718967 is about 16022.4519659133. The cubic root of 256718967 is about 635.5542865231.

The spelling of 256718967 in words is "two hundred fifty-six million, seven hundred eighteen thousand, nine hundred sixty-seven".