2168396186897 has 2 divisors, whose sum is σ = 2168396186898. Its totient is φ = 2168396186896.

The previous prime is 2168396186893. The next prime is 2168396186933. The reversal of 2168396186897 is 7986816938612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1850146760401 + 318249426496 = 1360201^2 + 564136^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168396186897 - 2² = 2168396186893 is a prime.

It is not a weakly prime, because it can be changed into another prime (2168396186893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084198093448 + 1084198093449.

It is an arithmetic number, because the mean of its divisors is an integer number (1084198093449).

Almost surely, 2^{2168396186897} is an apocalyptic number.

It is an amenable number.

2168396186897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168396186897 is an equidigital number, since it uses as much as digits as its factorization.

2168396186897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376233984, while the sum is 74.

The spelling of 2168396186897 in words is "two trillion, one hundred sixty-eight billion, three hundred ninety-six million, one hundred eighty-six thousand, eight hundred ninety-seven".