16679579209 has 2 divisors, whose sum is σ = 16679579210. Its totient is φ = 16679579208.

The previous prime is 16679579207. The next prime is 16679579261. The reversal of 16679579209 is 90297597661.

16679579209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10049060025 + 6630519184 = 100245^2 + 81428^2 .

It is a cyclic number.

It is not a de Polignac number, because 16679579209 - 2¹ = 16679579207 is a prime.

Together with 16679579207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16679579201) 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, 8339789604 + 8339789605.

It is an arithmetic number, because the mean of its divisors is an integer number (8339789605).

Almost surely, 2^16679579209 is an apocalyptic number.

It is an amenable number.

16679579209 is a deficient number, since it is larger than the sum of its proper divisors (1).

16679579209 is an equidigital number, since it uses as much as digits as its factorization.

16679579209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12859560, while the sum is 61.

The spelling of 16679579209 in words is "sixteen billion, six hundred seventy-nine million, five hundred seventy-nine thousand, two hundred nine".