1968492905191 has 2 divisors, whose sum is σ = 1968492905192. Its totient is φ = 1968492905190.

The previous prime is 1968492905177. The next prime is 1968492905209. The reversal of 1968492905191 is 1915092948691.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1968492905191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968492905111) 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, 984246452595 + 984246452596.

It is an arithmetic number, because the mean of its divisors is an integer number (984246452596).

Almost surely, 2^{1968492905191} is an apocalyptic number.

1968492905191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968492905191 is an equidigital number, since it uses as much as digits as its factorization.

1968492905191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12597120, while the sum is 64.

The spelling of 1968492905191 in words is "one trillion, nine hundred sixty-eight billion, four hundred ninety-two million, nine hundred five thousand, one hundred ninety-one".