256120635365 has 16 divisors (see below), whose sum is σ = 359818260480. Its totient is φ = 171342026880.

The previous prime is 256120635343. The next prime is 256120635371. The reversal of 256120635365 is 563536021652.

It is not a de Polignac number, because 256120635365 - 2¹² = 256120631269 is a prime.

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, 89239205 + ... + 89242074.

It is an arithmetic number, because the mean of its divisors is an integer number (22488641280).

Almost surely, 2^256120635365 is an apocalyptic number.

It is an amenable number.

256120635365 is a deficient number, since it is larger than the sum of its proper divisors (103697625115).

256120635365 is a wasteful number, since it uses less digits than its factorization.

256120635365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178481332.

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 256120635365 in words is "two hundred fifty-six billion, one hundred twenty million, six hundred thirty-five thousand, three hundred sixty-five".