16637945668 has 12 divisors (see below), whose sum is σ = 29735903232. Its totient is φ = 8141973320.

The previous prime is 16637945663. The next prime is 16637945699. The reversal of 16637945668 is 86654973661.

It is not an unprimeable number, because it can be changed into a prime (16637945663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44249668 + ... + 44250043.

It is an arithmetic number, because the mean of its divisors is an integer number (2477991936).

Almost surely, 2^16637945668 is an apocalyptic number.

It is an amenable number.

16637945668 is a deficient number, since it is larger than the sum of its proper divisors (13097957564).

16637945668 is a wasteful number, since it uses less digits than its factorization.

16637945668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88499762 (or 88499760 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 61.

The spelling of 16637945668 in words is "sixteen billion, six hundred thirty-seven million, nine hundred forty-five thousand, six hundred sixty-eight".