256222290965 has 16 divisors (see below), whose sum is σ = 325520035200. Its totient is φ = 193067030592.

The previous prime is 256222290853. The next prime is 256222290967. The reversal of 256222290965 is 569092222652.

It is a cyclic number.

It is not a de Polignac number, because 256222290965 - 2²² = 256218096661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256222290967) 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 15 ways as a sum of consecutive naturals, for example, 7778585 + ... + 7811454.

It is an arithmetic number, because the mean of its divisors is an integer number (20345002200).

Almost surely, 2^256222290965 is an apocalyptic number.

It is an amenable number.

256222290965 is a deficient number, since it is larger than the sum of its proper divisors (69297744235).

256222290965 is a wasteful number, since it uses less digits than its factorization.

256222290965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15590236.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 256222290965 in words is "two hundred fifty-six billion, two hundred twenty-two million, two hundred ninety thousand, nine hundred sixty-five".