16599008509 has 2 divisors, whose sum is σ = 16599008510. Its totient is φ = 16599008508.

The previous prime is 16599008501. The next prime is 16599008527. The reversal of 16599008509 is 90580099561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14767596484 + 1831412025 = 121522^2 + 42795^2 .

It is a cyclic number.

It is not a de Polignac number, because 16599008509 - 2³ = 16599008501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16599008501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8299504254 + 8299504255.

It is an arithmetic number, because the mean of its divisors is an integer number (8299504255).

Almost surely, 2^16599008509 is an apocalyptic number.

It is an amenable number.

16599008509 is a deficient number, since it is larger than the sum of its proper divisors (1).

16599008509 is an equidigital number, since it uses as much as digits as its factorization.

16599008509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 874800, while the sum is 52.

The spelling of 16599008509 in words is "sixteen billion, five hundred ninety-nine million, eight thousand, five hundred nine".