16641884161 has 12 divisors (see below), whose sum is σ = 19882142868. Its totient is φ = 13878944352.

The previous prime is 16641884131. The next prime is 16641884213. The reversal of 16641884161 is 16148814661.

16641884161 is digitally balanced in base 2, 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 2 ways, for example, as 16067083536 + 574800625 = 126756^2 + 23975^2 .

It is not a de Polignac number, because 16641884161 - 2¹³ = 16641875969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16641884111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4587786 + ... + 4591411.

It is an arithmetic number, because the mean of its divisors is an integer number (1656845239).

Almost surely, 2^16641884161 is an apocalyptic number.

It is an amenable number.

16641884161 is a deficient number, since it is larger than the sum of its proper divisors (3240258707).

16641884161 is an equidigital number, since it uses as much as digits as its factorization.

16641884161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9179248 (or 9179241 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The spelling of 16641884161 in words is "sixteen billion, six hundred forty-one million, eight hundred eighty-four thousand, one hundred sixty-one".