256576745 has 8 divisors (see below), whose sum is σ = 308629440. Its totient is φ = 204769840.

The previous prime is 256576711. The next prime is 256576757. The reversal of 256576745 is 547675652.

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

It is not a de Polignac number, because 256576745 - 2⁶ = 256576681 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256576745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59141 + ... + 63330.

It is an arithmetic number, because the mean of its divisors is an integer number (38578680).

Almost surely, 2^256576745 is an apocalyptic number.

It is an amenable number.

256576745 is a deficient number, since it is larger than the sum of its proper divisors (52052695).

256576745 is a wasteful number, since it uses less digits than its factorization.

256576745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122895.

The product of its digits is 1764000, while the sum is 47.

The square root of 256576745 is about 16018.0131414605. The cubic root of 256576745 is about 635.4368994053.

The spelling of 256576745 in words is "two hundred fifty-six million, five hundred seventy-six thousand, seven hundred forty-five".