168772499573 has 2 divisors, whose sum is σ = 168772499574. Its totient is φ = 168772499572.

The previous prime is 168772499561. The next prime is 168772499677. The reversal of 168772499573 is 375994277861.

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., 153430456804 + 15342042769 = 391702^2 + 123863^2 .

It is a cyclic number.

It is not a de Polignac number, because 168772499573 - 2⁶ = 168772499509 is a prime.

It is a super-2 number, since 2×168772499573² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168772490573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84386249786 + 84386249787.

It is an arithmetic number, because the mean of its divisors is an integer number (84386249787).

Almost surely, 2^168772499573 is an apocalyptic number.

It is an amenable number.

168772499573 is a deficient number, since it is larger than the sum of its proper divisors (1).

168772499573 is an equidigital number, since it uses as much as digits as its factorization.

168772499573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160030080, while the sum is 68.

The spelling of 168772499573 in words is "one hundred sixty-eight billion, seven hundred seventy-two million, four hundred ninety-nine thousand, five hundred seventy-three".