256204265365 has 4 divisors (see below), whose sum is σ = 307445118444. Its totient is φ = 204963412288.

The previous prime is 256204265357. The next prime is 256204265411. The reversal of 256204265365 is 563562402652.

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 160647854481 + 95556410884 = 400809^2 + 309122^2 .

It is a cyclic number.

It is not a de Polignac number, because 256204265365 - 2³ = 256204265357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25620426532 + ... + 25620426541.

It is an arithmetic number, because the mean of its divisors is an integer number (76861279611).

Almost surely, 2^256204265365 is an apocalyptic number.

It is an amenable number.

256204265365 is a deficient number, since it is larger than the sum of its proper divisors (51240853079).

256204265365 is an equidigital number, since it uses as much as digits as its factorization.

256204265365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51240853078.

The product of its (nonzero) digits is 2592000, while the sum is 46.

It can be divided in two parts, 25620 and 4265365, that added together give a triangular number (4290985 = T₂₉₂₉).

The spelling of 256204265365 in words is "two hundred fifty-six billion, two hundred four million, two hundred sixty-five thousand, three hundred sixty-five".