2556798291 has 10 divisors (see below), whose sum is σ = 3819414852. Its totient is φ = 1704532140.

The previous prime is 2556798287. The next prime is 2556798301. The reversal of 2556798291 is 1928976552.

2556798291 is a `hidden beast` number, since 2 + 556 + 7 + 9 + 82 + 9 + 1 = 666.

It is not a de Polignac number, because 2556798291 - 2² = 2556798287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2556798221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15782625 + ... + 15782786.

Almost surely, 2^2556798291 is an apocalyptic number.

2556798291 is a deficient number, since it is larger than the sum of its proper divisors (1262616561).

2556798291 is an equidigital number, since it uses as much as digits as its factorization.

2556798291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31565423 (or 31565414 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 2556798291 is about 50564.7929986863. The cubic root of 2556798291 is about 1367.4102230321.

The spelling of 2556798291 in words is "two billion, five hundred fifty-six million, seven hundred ninety-eight thousand, two hundred ninety-one".