168182195989 has 2 divisors, whose sum is σ = 168182195990. Its totient is φ = 168182195988.

The previous prime is 168182195983. The next prime is 168182196011. The reversal of 168182195989 is 989591281861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114748175025 + 53434020964 = 338745^2 + 231158^2 .

It is a cyclic number.

It is not a de Polignac number, because 168182195989 - 2¹¹ = 168182193941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168182195983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84091097994 + 84091097995.

It is an arithmetic number, because the mean of its divisors is an integer number (84091097995).

Almost surely, 2^168182195989 is an apocalyptic number.

It is an amenable number.

168182195989 is a deficient number, since it is larger than the sum of its proper divisors (1).

168182195989 is an equidigital number, since it uses as much as digits as its factorization.

168182195989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 67.

The spelling of 168182195989 in words is "one hundred sixty-eight billion, one hundred eighty-two million, one hundred ninety-five thousand, nine hundred eighty-nine".