16604475172205 has 4 divisors (see below), whose sum is σ = 19925370206652. Its totient is φ = 13283580137760.

The previous prime is 16604475172147. The next prime is 16604475172211. The reversal of 16604475172205 is 50227157440661.

It is a happy number.

16604475172205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1751922254404 + 14852552917801 = 1323602^2 + 3853901^2 .

It is not a de Polignac number, because 16604475172205 - 2¹⁶ = 16604475106669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1660447517216 + ... + 1660447517225.

It is an arithmetic number, because the mean of its divisors is an integer number (4981342551663).

Almost surely, 2^{16604475172205} is an apocalyptic number.

It is an amenable number.

16604475172205 is a deficient number, since it is larger than the sum of its proper divisors (3320895034447).

16604475172205 is an equidigital number, since it uses as much as digits as its factorization.

16604475172205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320895034446.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 16604475172205 in words is "sixteen trillion, six hundred four billion, four hundred seventy-five million, one hundred seventy-two thousand, two hundred five".