16684173841 has 4 divisors (see below), whose sum is σ = 16684494372. Its totient is φ = 16683853312.

The previous prime is 16684173839. The next prime is 16684173853. The reversal of 16684173841 is 14837148661.

It is a happy number.

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 5889795025 + 10794378816 = 76745^2 + 103896^2 .

It is a cyclic number.

It is not a de Polignac number, because 16684173841 - 2¹ = 16684173839 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16684173641) 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, 62176 + ... + 192961.

It is an arithmetic number, because the mean of its divisors is an integer number (4171123593).

Almost surely, 2^16684173841 is an apocalyptic number.

It is an amenable number.

16684173841 is a deficient number, since it is larger than the sum of its proper divisors (320531).

16684173841 is an equidigital number, since it uses as much as digits as its factorization.

16684173841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320530.

The product of its digits is 774144, while the sum is 49.

The spelling of 16684173841 in words is "sixteen billion, six hundred eighty-four million, one hundred seventy-three thousand, eight hundred forty-one".