16741568209 has 4 divisors (see below), whose sum is σ = 16783738804. Its totient is φ = 16699397616.

The previous prime is 16741568189. The next prime is 16741568219. The reversal of 16741568209 is 90286514761.

It is a happy number.

16741568209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5034328209 + 11707240000 = 70953^2 + 108200^2 .

It is a cyclic number.

It is not a de Polignac number, because 16741568209 - 2⁵ = 16741568177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16741568219) 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 in 3 ways as a sum of consecutive naturals, for example, 21084702 + ... + 21085495.

It is an arithmetic number, because the mean of its divisors is an integer number (4195934701).

Almost surely, 2^16741568209 is an apocalyptic number.

It is an amenable number.

16741568209 is a deficient number, since it is larger than the sum of its proper divisors (42170595).

16741568209 is an equidigital number, since it uses as much as digits as its factorization.

16741568209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42170594.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 16741568209 in words is "sixteen billion, seven hundred forty-one million, five hundred sixty-eight thousand, two hundred nine".