168632620813 has 2 divisors, whose sum is σ = 168632620814. Its totient is φ = 168632620812.

The previous prime is 168632620787. The next prime is 168632620829. The reversal of 168632620813 is 318026236861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148184192809 + 20448428004 = 384947^2 + 142998^2 .

It is a cyclic number.

It is not a de Polignac number, because 168632620813 - 2¹⁷ = 168632489741 is a prime.

It is a super-2 number, since 2×168632620813² (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 (168632620213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84316310406 + 84316310407.

It is an arithmetic number, because the mean of its divisors is an integer number (84316310407).

Almost surely, 2^168632620813 is an apocalyptic number.

It is an amenable number.

168632620813 is a deficient number, since it is larger than the sum of its proper divisors (1).

168632620813 is an equidigital number, since it uses as much as digits as its factorization.

168632620813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 168632620813 in words is "one hundred sixty-eight billion, six hundred thirty-two million, six hundred twenty thousand, eight hundred thirteen".