168138428299 has 2 divisors, whose sum is σ = 168138428300. Its totient is φ = 168138428298.

The previous prime is 168138428177. The next prime is 168138428369. The reversal of 168138428299 is 992824831861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168138428299 - 2²¹ = 168136331147 is a prime.

It is not a weakly prime, because it can be changed into another prime (168138428999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84069214149 + 84069214150.

It is an arithmetic number, because the mean of its divisors is an integer number (84069214150).

Almost surely, 2^168138428299 is an apocalyptic number.

168138428299 is a deficient number, since it is larger than the sum of its proper divisors (1).

168138428299 is an equidigital number, since it uses as much as digits as its factorization.

168138428299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11943936, while the sum is 61.

The spelling of 168138428299 in words is "one hundred sixty-eight billion, one hundred thirty-eight million, four hundred twenty-eight thousand, two hundred ninety-nine".