168401687033 has 2 divisors, whose sum is σ = 168401687034. Its totient is φ = 168401687032.

The previous prime is 168401687021. The next prime is 168401687059. The reversal of 168401687033 is 330786104861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166960497664 + 1441189369 = 408608^2 + 37963^2 .

It is a cyclic number.

It is not a de Polignac number, because 168401687033 - 2¹⁰ = 168401686009 is a prime.

It is not a weakly prime, because it can be changed into another prime (168401687633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84200843516 + 84200843517.

It is an arithmetic number, because the mean of its divisors is an integer number (84200843517).

Almost surely, 2^168401687033 is an apocalyptic number.

It is an amenable number.

168401687033 is a deficient number, since it is larger than the sum of its proper divisors (1).

168401687033 is an equidigital number, since it uses as much as digits as its factorization.

168401687033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 168401687033 in words is "one hundred sixty-eight billion, four hundred one million, six hundred eighty-seven thousand, thirty-three".