256675765 has 8 divisors (see below), whose sum is σ = 309157560. Its totient is φ = 204576192.

The previous prime is 256675751. The next prime is 256675777. The reversal of 256675765 is 567576652.

It can be written as a sum of positive squares in 4 ways, for example, as 5484964 + 251190801 = 2342^2 + 15849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256675765 - 2⁷ = 256675637 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94074 + ... + 96763.

It is an arithmetic number, because the mean of its divisors is an integer number (38644695).

Almost surely, 2^256675765 is an apocalyptic number.

It is an amenable number.

256675765 is a deficient number, since it is larger than the sum of its proper divisors (52481795).

256675765 is a wasteful number, since it uses less digits than its factorization.

256675765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191111.

The product of its digits is 2646000, while the sum is 49.

The square root of 256675765 is about 16021.1037385069. The cubic root of 256675765 is about 635.5186330652.

The spelling of 256675765 in words is "two hundred fifty-six million, six hundred seventy-five thousand, seven hundred sixty-five".