168962975989 has 2 divisors, whose sum is σ = 168962975990. Its totient is φ = 168962975988.

The previous prime is 168962975983. The next prime is 168962976103. The reversal of 168962975989 is 989579269861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97208639089 + 71754336900 = 311783^2 + 267870^2 .

It is a cyclic number.

It is not a de Polignac number, because 168962975989 - 2¹⁷ = 168962844917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168962975983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84481487994 + 84481487995.

It is an arithmetic number, because the mean of its divisors is an integer number (84481487995).

Almost surely, 2^168962975989 is an apocalyptic number.

It is an amenable number.

168962975989 is a deficient number, since it is larger than the sum of its proper divisors (1).

168962975989 is an equidigital number, since it uses as much as digits as its factorization.

168962975989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058158080, while the sum is 79.

The spelling of 168962975989 in words is "one hundred sixty-eight billion, nine hundred sixty-two million, nine hundred seventy-five thousand, nine hundred eighty-nine".