16718915409 has 16 divisors (see below), whose sum is σ = 25496880000. Its totient is φ = 9546001920.

The previous prime is 16718915383. The next prime is 16718915449. The reversal of 16718915409 is 90451981761.

16718915409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16718915409 - 2⁹ = 16718914897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16718915449) 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 15 ways as a sum of consecutive naturals, for example, 292482 + ... + 344939.

It is an arithmetic number, because the mean of its divisors is an integer number (1593555000).

Almost surely, 2^16718915409 is an apocalyptic number.

It is an amenable number.

16718915409 is a deficient number, since it is larger than the sum of its proper divisors (8777964591).

16718915409 is a wasteful number, since it uses less digits than its factorization.

16718915409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638680.

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 16718915409 in words is "sixteen billion, seven hundred eighteen million, nine hundred fifteen thousand, four hundred nine".