2168639082209 has 2 divisors, whose sum is σ = 2168639082210. Its totient is φ = 2168639082208.

The previous prime is 2168639082187. The next prime is 2168639082221. The reversal of 2168639082209 is 9022809368612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2062949072209 + 105690010000 = 1436297^2 + 325100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168639082209 - 2⁸ = 2168639081953 is a prime.

It is not a weakly prime, because it can be changed into another prime (2168639042209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084319541104 + 1084319541105.

It is an arithmetic number, because the mean of its divisors is an integer number (1084319541105).

Almost surely, 2^{2168639082209} is an apocalyptic number.

It is an amenable number.

2168639082209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168639082209 is an equidigital number, since it uses as much as digits as its factorization.

2168639082209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 2168639082209 in words is "two trillion, one hundred sixty-eight billion, six hundred thirty-nine million, eighty-two thousand, two hundred nine".