168317378039 has 2 divisors, whose sum is σ = 168317378040. Its totient is φ = 168317378038.

The previous prime is 168317377981. The next prime is 168317378041. The reversal of 168317378039 is 930873713861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168317378039 is a prime.

Together with 168317378041, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168317372039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84158689019 + 84158689020.

It is an arithmetic number, because the mean of its divisors is an integer number (84158689020).

Almost surely, 2^168317378039 is an apocalyptic number.

168317378039 is a deficient number, since it is larger than the sum of its proper divisors (1).

168317378039 is an equidigital number, since it uses as much as digits as its factorization.

168317378039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 168317378039 in words is "one hundred sixty-eight billion, three hundred seventeen million, three hundred seventy-eight thousand, thirty-nine".