168636836387 has 2 divisors, whose sum is σ = 168636836388. Its totient is φ = 168636836386.

The previous prime is 168636836359. The next prime is 168636836393. The reversal of 168636836387 is 783638636861.

It is a strong prime.

It is an emirp because it is prime and its reverse (783638636861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168636836387 - 2¹² = 168636832291 is a prime.

It is not a weakly prime, because it can be changed into another prime (168636836287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84318418193 + 84318418194.

It is an arithmetic number, because the mean of its divisors is an integer number (84318418194).

Almost surely, 2^168636836387 is an apocalyptic number.

168636836387 is a deficient number, since it is larger than the sum of its proper divisors (1).

168636836387 is an equidigital number, since it uses as much as digits as its factorization.

168636836387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125411328, while the sum is 65.

The spelling of 168636836387 in words is "one hundred sixty-eight billion, six hundred thirty-six million, eight hundred thirty-six thousand, three hundred eighty-seven".