168407946169 has 2 divisors, whose sum is σ = 168407946170. Its totient is φ = 168407946168.

The previous prime is 168407946163. The next prime is 168407946193. The reversal of 168407946169 is 961649704861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162243812025 + 6164134144 = 402795^2 + 78512^2 .

It is an emirp because it is prime and its reverse (961649704861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168407946169 - 2¹⁷ = 168407815097 is a prime.

It is a super-2 number, since 2×168407946169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168407946163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84203973084 + 84203973085.

It is an arithmetic number, because the mean of its divisors is an integer number (84203973085).

Almost surely, 2^168407946169 is an apocalyptic number.

It is an amenable number.

168407946169 is a deficient number, since it is larger than the sum of its proper divisors (1).

168407946169 is an equidigital number, since it uses as much as digits as its factorization.

168407946169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 168407946169 in words is "one hundred sixty-eight billion, four hundred seven million, nine hundred forty-six thousand, one hundred sixty-nine".