256672965 has 16 divisors (see below), whose sum is σ = 412004736. Its totient is φ = 136449600.

The previous prime is 256672943. The next prime is 256672973. The reversal of 256672965 is 569276652.

It is not a de Polignac number, because 256672965 - 2¹⁰ = 256671941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22846 + ... + 32175.

It is an arithmetic number, because the mean of its divisors is an integer number (25750296).

Almost surely, 2^256672965 is an apocalyptic number.

It is an amenable number.

256672965 is a deficient number, since it is larger than the sum of its proper divisors (155331771).

256672965 is a wasteful number, since it uses less digits than its factorization.

256672965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55340.

The product of its digits is 1360800, while the sum is 48.

The square root of 256672965 is about 16021.0163535276. The cubic root of 256672965 is about 635.5163221618.

The spelling of 256672965 in words is "two hundred fifty-six million, six hundred seventy-two thousand, nine hundred sixty-five".