16636109 has 8 divisors (see below), whose sum is σ = 19038720. Its totient is φ = 14240016.

The previous prime is 16636099. The next prime is 16636121. The reversal of 16636109 is 90163661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16636109 - 2⁴ = 16636093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16636129) 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, 6692 + ... + 8834.

It is an arithmetic number, because the mean of its divisors is an integer number (2379840).

Almost surely, 2^16636109 is an apocalyptic number.

It is an amenable number.

16636109 is a deficient number, since it is larger than the sum of its proper divisors (2402611).

16636109 is a wasteful number, since it uses less digits than its factorization.

16636109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16636109 is about 4078.7386530642. The cubic root of 16636109 is about 255.2802711049.

The spelling of 16636109 in words is "sixteen million, six hundred thirty-six thousand, one hundred nine".