256422503165 has 16 divisors (see below), whose sum is σ = 310810300416. Its totient is φ = 203069880000.

The previous prime is 256422503159. The next prime is 256422503171. The reversal of 256422503165 is 561305224652.

It is an interprime number because it is at equal distance from previous prime (256422503159) and next prime (256422503171).

It is not a de Polignac number, because 256422503165 - 2²⁶ = 256355394301 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 15 ways as a sum of consecutive naturals, for example, 2911364 + ... + 2998146.

It is an arithmetic number, because the mean of its divisors is an integer number (19425643776).

Almost surely, 2^256422503165 is an apocalyptic number.

It is an amenable number.

256422503165 is a deficient number, since it is larger than the sum of its proper divisors (54387797251).

256422503165 is a wasteful number, since it uses less digits than its factorization.

256422503165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92740.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 256422503165 in words is "two hundred fifty-six billion, four hundred twenty-two million, five hundred three thousand, one hundred sixty-five".