16650509918 has 32 divisors (see below), whose sum is σ = 29260562688. Its totient is φ = 6956971200.

The previous prime is 16650509873. The next prime is 16650509927. The reversal of 16650509918 is 81990505661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869321 + ... + 888267.

It is an arithmetic number, because the mean of its divisors is an integer number (914392584).

Almost surely, 2^16650509918 is an apocalyptic number.

16650509918 is a deficient number, since it is larger than the sum of its proper divisors (12610052770).

16650509918 is a wasteful number, since it uses less digits than its factorization.

16650509918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20528.

The product of its (nonzero) digits is 583200, while the sum is 50.

The spelling of 16650509918 in words is "sixteen billion, six hundred fifty million, five hundred nine thousand, nine hundred eighteen".