168736337813 has 2 divisors, whose sum is σ = 168736337814. Its totient is φ = 168736337812.

The previous prime is 168736337773. The next prime is 168736337839. The reversal of 168736337813 is 318733637861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114350832964 + 54385504849 = 338158^2 + 233207^2 .

It is a cyclic number.

It is not a de Polignac number, because 168736337813 - 2⁸ = 168736337557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168736337843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84368168906 + 84368168907.

It is an arithmetic number, because the mean of its divisors is an integer number (84368168907).

Almost surely, 2^168736337813 is an apocalyptic number.

It is an amenable number.

168736337813 is a deficient number, since it is larger than the sum of its proper divisors (1).

168736337813 is an equidigital number, since it uses as much as digits as its factorization.

168736337813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 56.

The spelling of 168736337813 in words is "one hundred sixty-eight billion, seven hundred thirty-six million, three hundred thirty-seven thousand, eight hundred thirteen".