256255802065 has 8 divisors (see below), whose sum is σ = 308171127168. Its totient is φ = 204561865200.

The previous prime is 256255802057. The next prime is 256255802083. The reversal of 256255802065 is 560208552652.

256255802065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 256255802065 - 2³ = 256255802057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55344511 + ... + 55349140.

It is an arithmetic number, because the mean of its divisors is an integer number (38521390896).

Almost surely, 2^256255802065 is an apocalyptic number.

It is an amenable number.

256255802065 is a deficient number, since it is larger than the sum of its proper divisors (51915325103).

256255802065 is a wasteful number, since it uses less digits than its factorization.

256255802065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110694119.

The product of its (nonzero) digits is 1440000, while the sum is 46.

The spelling of 256255802065 in words is "two hundred fifty-six billion, two hundred fifty-five million, eight hundred two thousand, sixty-five".