16500003634 has 16 divisors (see below), whose sum is σ = 24837602328. Its totient is φ = 8220845952.

The previous prime is 16500003577. The next prime is 16500003679. The reversal of 16500003634 is 43630000561.

It can be written as a sum of positive squares in 4 ways, for example, as 16066323009 + 433680625 = 126753^2 + 20825^2 .

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 7 ways as a sum of consecutive naturals, for example, 810144 + ... + 830260.

Almost surely, 2^16500003634 is an apocalyptic number.

16500003634 is a deficient number, since it is larger than the sum of its proper divisors (8337598694).

16500003634 is a wasteful number, since it uses less digits than its factorization.

16500003634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21549.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 16500003634 in words is "sixteen billion, five hundred million, three thousand, six hundred thirty-four".