168072742631 has 2 divisors, whose sum is σ = 168072742632. Its totient is φ = 168072742630.

The previous prime is 168072742597. The next prime is 168072742727. The reversal of 168072742631 is 136247270861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168072742631 - 2⁶ = 168072742567 is a prime.

It is a super-2 number, since 2×168072742631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168072742531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84036371315 + 84036371316.

It is an arithmetic number, because the mean of its divisors is an integer number (84036371316).

Almost surely, 2^168072742631 is an apocalyptic number.

168072742631 is a deficient number, since it is larger than the sum of its proper divisors (1).

168072742631 is an equidigital number, since it uses as much as digits as its factorization.

168072742631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 168072742631 in words is "one hundred sixty-eight billion, seventy-two million, seven hundred forty-two thousand, six hundred thirty-one".