16643155916 has 12 divisors (see below), whose sum is σ = 29126431488. Its totient is φ = 8321318352.

The previous prime is 16643155897. The next prime is 16643155931. The reversal of 16643155916 is 61955134661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194870 + ... + 266946.

It is an arithmetic number, because the mean of its divisors is an integer number (2427202624).

Almost surely, 2^16643155916 is an apocalyptic number.

It is an amenable number.

16643155916 is a deficient number, since it is larger than the sum of its proper divisors (12483275572).

16643155916 is a wasteful number, since it uses less digits than its factorization.

16643155916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129808 (or 129806 counting only the distinct ones).

The product of its digits is 583200, while the sum is 47.

The spelling of 16643155916 in words is "sixteen billion, six hundred forty-three million, one hundred fifty-five thousand, nine hundred sixteen".