168336826993 has 2 divisors, whose sum is σ = 168336826994. Its totient is φ = 168336826992.

The previous prime is 168336826961. The next prime is 168336827011. The reversal of 168336826993 is 399628633861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84857437809 + 83479389184 = 291303^2 + 288928^2 .

It is an emirp because it is prime and its reverse (399628633861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168336826993 - 2⁵ = 168336826961 is a prime.

It is not a weakly prime, because it can be changed into another prime (168336826393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84168413496 + 84168413497.

It is an arithmetic number, because the mean of its divisors is an integer number (84168413497).

Almost surely, 2^168336826993 is an apocalyptic number.

It is an amenable number.

168336826993 is a deficient number, since it is larger than the sum of its proper divisors (1).

168336826993 is an equidigital number, since it uses as much as digits as its factorization.

168336826993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60466176, while the sum is 64.

The spelling of 168336826993 in words is "one hundred sixty-eight billion, three hundred thirty-six million, eight hundred twenty-six thousand, nine hundred ninety-three".