168636212399 has 2 divisors, whose sum is σ = 168636212400. Its totient is φ = 168636212398.

The previous prime is 168636212363. The next prime is 168636212401. The reversal of 168636212399 is 993212636861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168636212399 is a prime.

Together with 168636212401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168636242399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84318106199 + 84318106200.

It is an arithmetic number, because the mean of its divisors is an integer number (84318106200).

Almost surely, 2^168636212399 is an apocalyptic number.

168636212399 is a deficient number, since it is larger than the sum of its proper divisors (1).

168636212399 is an equidigital number, since it uses as much as digits as its factorization.

168636212399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 56.

The spelling of 168636212399 in words is "one hundred sixty-eight billion, six hundred thirty-six million, two hundred twelve thousand, three hundred ninety-nine".