7768491710891 has 2 divisors, whose sum is σ = 7768491710892. Its totient is φ = 7768491710890.

The previous prime is 7768491710879. The next prime is 7768491710909. The reversal of 7768491710891 is 1980171948677.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7768491710891 is a prime.

It is not a weakly prime, because it can be changed into another prime (7768491715891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3884245855445 + 3884245855446.

It is an arithmetic number, because the mean of its divisors is an integer number (3884245855446).

Almost surely, 2^{7768491710891} is an apocalyptic number.

7768491710891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7768491710891 is an equidigital number, since it uses as much as digits as its factorization.

7768491710891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42674688, while the sum is 68.

The spelling of 7768491710891 in words is "seven trillion, seven hundred sixty-eight billion, four hundred ninety-one million, seven hundred ten thousand, eight hundred ninety-one".