256545652 has 72 divisors (see below), whose sum is σ = 513398088. Its totient is φ = 112020480.

The previous prime is 256545647. The next prime is 256545683.

256545652 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 78216336 + 178329316 = 8844^2 + 13354^2 .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1872528 + ... + 1872664.

It is an arithmetic number, because the mean of its divisors is an integer number (7130529).

Almost surely, 2^256545652 is an apocalyptic number.

256545652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256545652 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

256545652 is a wasteful number, since it uses less digits than its factorization.

256545652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 276 counting only the distinct ones).

The product of its digits is 360000, while the sum is 40.

The square root of 256545652 is about 16017.0425484857. The cubic root of 256545652 is about 635.4112301036.

The spelling of 256545652 in words is "two hundred fifty-six million, five hundred forty-five thousand, six hundred fifty-two".