16599918227729 has 2 divisors, whose sum is σ = 16599918227730. Its totient is φ = 16599918227728.

The previous prime is 16599918227597. The next prime is 16599918227749. The reversal of 16599918227729 is 92772281999561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15304737664129 + 1295180563600 = 3912127^2 + 1138060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16599918227729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16599918227729.

It is not a weakly prime, because it can be changed into another prime (16599918227749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8299959113864 + 8299959113865.

It is an arithmetic number, because the mean of its divisors is an integer number (8299959113865).

Almost surely, 2^{16599918227729} is an apocalyptic number.

It is an amenable number.

16599918227729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16599918227729 is an equidigital number, since it uses as much as digits as its factorization.

16599918227729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 617258880, while the sum is 77.

The spelling of 16599918227729 in words is "sixteen trillion, five hundred ninety-nine billion, nine hundred eighteen million, two hundred twenty-seven thousand, seven hundred twenty-nine".