168659417879 has 2 divisors, whose sum is σ = 168659417880. Its totient is φ = 168659417878.

The previous prime is 168659417821. The next prime is 168659417903. The reversal of 168659417879 is 978714956861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168659417879 - 2²⁸ = 168390982423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168659417819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84329708939 + 84329708940.

It is an arithmetic number, because the mean of its divisors is an integer number (84329708940).

Almost surely, 2^168659417879 is an apocalyptic number.

168659417879 is a deficient number, since it is larger than the sum of its proper divisors (1).

168659417879 is an equidigital number, since it uses as much as digits as its factorization.

168659417879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182891520, while the sum is 71.

The spelling of 168659417879 in words is "one hundred sixty-eight billion, six hundred fifty-nine million, four hundred seventeen thousand, eight hundred seventy-nine".