2556380797199 has 2 divisors, whose sum is σ = 2556380797200. Its totient is φ = 2556380797198.

The previous prime is 2556380797171. The next prime is 2556380797207. The reversal of 2556380797199 is 9917970836552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556380797199 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556380797129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278190398599 + 1278190398600.

It is an arithmetic number, because the mean of its divisors is an integer number (1278190398600).

Almost surely, 2^{2556380797199} is an apocalyptic number.

2556380797199 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556380797199 is an equidigital number, since it uses as much as digits as its factorization.

2556380797199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 257191200, while the sum is 71.

The spelling of 2556380797199 in words is "two trillion, five hundred fifty-six billion, three hundred eighty million, seven hundred ninety-seven thousand, one hundred ninety-nine".