16684072189 has 4 divisors (see below), whose sum is σ = 17409466656. Its totient is φ = 15958677724.

The previous prime is 16684072177. The next prime is 16684072199. The reversal of 16684072189 is 98127048661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16684072189 - 2¹⁹ = 16683547901 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 (16684072199) 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, 362697199 + ... + 362697244.

It is an arithmetic number, because the mean of its divisors is an integer number (4352366664).

Almost surely, 2^16684072189 is an apocalyptic number.

It is an amenable number.

16684072189 is a deficient number, since it is larger than the sum of its proper divisors (725394467).

16684072189 is an equidigital number, since it uses as much as digits as its factorization.

16684072189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725394466.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 16684072189 in words is "sixteen billion, six hundred eighty-four million, seventy-two thousand, one hundred eighty-nine".