16544566634 has 16 divisors (see below), whose sum is σ = 26289956808. Its totient is φ = 7781740032.

The previous prime is 16544566589. The next prime is 16544566639. The reversal of 16544566634 is 43666544561.

16544566634 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15563311009 + 981255625 = 124753^2 + 31325^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16544566639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54317 + ... + 189840.

Almost surely, 2^16544566634 is an apocalyptic number.

16544566634 is a deficient number, since it is larger than the sum of its proper divisors (9745390174).

16544566634 is a wasteful number, since it uses less digits than its factorization.

16544566634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246169.

The product of its digits is 6220800, while the sum is 50.

The spelling of 16544566634 in words is "sixteen billion, five hundred forty-four million, five hundred sixty-six thousand, six hundred thirty-four".