2556379186749 has 12 divisors (see below), whose sum is σ = 3853093267296. Its totient is φ = 1630154843592.

The previous prime is 2556379186679. The next prime is 2556379186807. The reversal of 2556379186749 is 9476819736552.

2556379186749 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 379 + 186 + 74 + 9 = 666.

It is not a de Polignac number, because 2556379186749 - 2²⁰ = 2556378138173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556379986749) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6174828747 + ... + 6174829160.

It is an arithmetic number, because the mean of its divisors is an integer number (321091105608).

Almost surely, 2^{2556379186749} is an apocalyptic number.

It is an amenable number.

2556379186749 is a deficient number, since it is larger than the sum of its proper divisors (1296714080547).

2556379186749 is a wasteful number, since it uses less digits than its factorization.

2556379186749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12349657936 (or 12349657933 counting only the distinct ones).

The product of its digits is 685843200, while the sum is 72.

The spelling of 2556379186749 in words is "two trillion, five hundred fifty-six billion, three hundred seventy-nine million, one hundred eighty-six thousand, seven hundred forty-nine".