2556309248791 has 2 divisors, whose sum is σ = 2556309248792. Its totient is φ = 2556309248790.

The previous prime is 2556309248737. The next prime is 2556309248803. The reversal of 2556309248791 is 1978429036552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556309248791 - 2⁹ = 2556309248279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556309248711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278154624395 + 1278154624396.

It is an arithmetic number, because the mean of its divisors is an integer number (1278154624396).

It is a 1-persistent number, because it is pandigital, but 2⋅2556309248791 = 5112618497582 is not.

Almost surely, 2^{2556309248791} is an apocalyptic number.

2556309248791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556309248791 is an equidigital number, since it uses as much as digits as its factorization.

2556309248791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32659200, while the sum is 61.

The spelling of 2556309248791 in words is "two trillion, five hundred fifty-six billion, three hundred nine million, two hundred forty-eight thousand, seven hundred ninety-one".