256745755 has 8 divisors (see below), whose sum is σ = 352108512. Its totient is φ = 176054208.

The previous prime is 256745719. The next prime is 256745759. The reversal of 256745755 is 557547652.

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 256745755 - 2⁹ = 256745243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256745759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3667762 + ... + 3667831.

It is an arithmetic number, because the mean of its divisors is an integer number (44013564).

Almost surely, 2^256745755 is an apocalyptic number.

256745755 is a deficient number, since it is larger than the sum of its proper divisors (95362757).

256745755 is an equidigital number, since it uses as much as digits as its factorization.

256745755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335605.

The product of its digits is 1470000, while the sum is 46.

The square root of 256745755 is about 16023.2878960593. The cubic root of 256745755 is about 635.5763919357.

The spelling of 256745755 in words is "two hundred fifty-six million, seven hundred forty-five thousand, seven hundred fifty-five".