256552757 has 4 divisors (see below), whose sum is σ = 257240940. Its totient is φ = 255864576.

The previous prime is 256552753. The next prime is 256552759. The reversal of 256552757 is 757255652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91661476 + 164891281 = 9574^2 + 12841^2 .

It is a cyclic number.

It is not a de Polignac number, because 256552757 - 2² = 256552753 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256552753) 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 3 ways as a sum of consecutive naturals, for example, 343532 + ... + 344277.

It is an arithmetic number, because the mean of its divisors is an integer number (64310235).

Almost surely, 2^256552757 is an apocalyptic number.

It is an amenable number.

256552757 is a deficient number, since it is larger than the sum of its proper divisors (688183).

256552757 is an equidigital number, since it uses as much as digits as its factorization.

256552757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688182.

The product of its digits is 735000, while the sum is 44.

The square root of 256552757 is about 16017.2643419530. The cubic root of 256552757 is about 635.4170959278.

The spelling of 256552757 in words is "two hundred fifty-six million, five hundred fifty-two thousand, seven hundred fifty-seven".