191168855879 has 2 divisors, whose sum is σ = 191168855880. Its totient is φ = 191168855878.

The previous prime is 191168855831. The next prime is 191168855893. The reversal of 191168855879 is 978558861191.

191168855879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (978558861191) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191168855879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191168852879) 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 as a sum of consecutive naturals, namely, 95584427939 + 95584427940.

It is an arithmetic number, because the mean of its divisors is an integer number (95584427940).

Almost surely, 2^191168855879 is an apocalyptic number.

191168855879 is a deficient number, since it is larger than the sum of its proper divisors (1).

191168855879 is an equidigital number, since it uses as much as digits as its factorization.

191168855879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 68.

The spelling of 191168855879 in words is "one hundred ninety-one billion, one hundred sixty-eight million, eight hundred fifty-five thousand, eight hundred seventy-nine".