168591680791 has 2 divisors, whose sum is σ = 168591680792. Its totient is φ = 168591680790.

The previous prime is 168591680759. The next prime is 168591680797. The reversal of 168591680791 is 197086195861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168591680791 - 2⁵ = 168591680759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168591680797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84295840395 + 84295840396.

It is an arithmetic number, because the mean of its divisors is an integer number (84295840396).

Almost surely, 2^168591680791 is an apocalyptic number.

168591680791 is a deficient number, since it is larger than the sum of its proper divisors (1).

168591680791 is an equidigital number, since it uses as much as digits as its factorization.

168591680791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 61.

The spelling of 168591680791 in words is "one hundred sixty-eight billion, five hundred ninety-one million, six hundred eighty thousand, seven hundred ninety-one".