16216404404 has 12 divisors (see below), whose sum is σ = 28383205284. Its totient is φ = 8106917184.

The previous prime is 16216404401. The next prime is 16216404443. The reversal of 16216404404 is 40440461261.

16216404404 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 12409514404 + 3806890000 = 111398^2 + 61700^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16216404401) 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 3 ways as a sum of consecutive naturals, for example, 292577 + ... + 343560.

It is an arithmetic number, because the mean of its divisors is an integer number (2365267107).

Almost surely, 2^16216404404 is an apocalyptic number.

It is an amenable number.

16216404404 is a deficient number, since it is larger than the sum of its proper divisors (12166800880).

16216404404 is a wasteful number, since it uses less digits than its factorization.

16216404404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642514 (or 642512 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 16216404404 its reverse (40440461261), we get a palindrome (56656865665).

The spelling of 16216404404 in words is "sixteen billion, two hundred sixteen million, four hundred four thousand, four hundred four".