168150549569 has 2 divisors, whose sum is σ = 168150549570. Its totient is φ = 168150549568.

The previous prime is 168150549527. The next prime is 168150549629. The reversal of 168150549569 is 965945051861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167598534544 + 552015025 = 409388^2 + 23495^2 .

It is a cyclic number.

It is not a de Polignac number, because 168150549569 - 2¹² = 168150545473 is a prime.

It is a super-2 number, since 2×168150549569² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (168150542569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84075274784 + 84075274785.

It is an arithmetic number, because the mean of its divisors is an integer number (84075274785).

Almost surely, 2^168150549569 is an apocalyptic number.

It is an amenable number.

168150549569 is a deficient number, since it is larger than the sum of its proper divisors (1).

168150549569 is an equidigital number, since it uses as much as digits as its factorization.

168150549569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664000, while the sum is 59.

The spelling of 168150549569 in words is "one hundred sixty-eight billion, one hundred fifty million, five hundred forty-nine thousand, five hundred sixty-nine".