2256312121256 has 64 divisors (see below), whose sum is σ = 4406551296000. Its totient is φ = 1081918918080.

The previous prime is 2256312121249. The next prime is 2256312121267. The reversal of 2256312121256 is 6521212136522.

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, 18796355 + ... + 18916013.

It is an arithmetic number, because the mean of its divisors is an integer number (68852364000).

Almost surely, 2^{2256312121256} is an apocalyptic number.

It is an amenable number.

2256312121256 is a deficient number, since it is larger than the sum of its proper divisors (2150239174744).

2256312121256 is a wasteful number, since it uses less digits than its factorization.

2256312121256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120382 (or 120378 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

Adding to 2256312121256 its reverse (6521212136522), we get a palindrome (8777524257778).

The spelling of 2256312121256 in words is "two trillion, two hundred fifty-six billion, three hundred twelve million, one hundred twenty-one thousand, two hundred fifty-six".