168164392789 has 2 divisors, whose sum is σ = 168164392790. Its totient is φ = 168164392788.

The previous prime is 168164392769. The next prime is 168164392841. The reversal of 168164392789 is 987293461861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144134122500 + 24030270289 = 379650^2 + 155017^2 .

It is a cyclic number.

It is not a de Polignac number, because 168164392789 - 2⁵ = 168164392757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168164392789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168164392769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84082196394 + 84082196395.

It is an arithmetic number, because the mean of its divisors is an integer number (84082196395).

Almost surely, 2^168164392789 is an apocalyptic number.

It is an amenable number.

168164392789 is a deficient number, since it is larger than the sum of its proper divisors (1).

168164392789 is an equidigital number, since it uses as much as digits as its factorization.

168164392789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 64.

The spelling of 168164392789 in words is "one hundred sixty-eight billion, one hundred sixty-four million, three hundred ninety-two thousand, seven hundred eighty-nine".