16504441 has 4 divisors (see below), whose sum is σ = 16650612. Its totient is φ = 16358272.

The previous prime is 16504421. The next prime is 16504457. The reversal of 16504441 is 14440561.

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 3515625 + 12988816 = 1875^2 + 3604^2 .

It is a cyclic number.

It is not a de Polignac number, because 16504441 - 2¹⁵ = 16471673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16504421) 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, 72916 + ... + 73141.

It is an arithmetic number, because the mean of its divisors is an integer number (4162653).

Almost surely, 2^16504441 is an apocalyptic number.

It is an amenable number.

16504441 is a deficient number, since it is larger than the sum of its proper divisors (146171).

16504441 is a wasteful number, since it uses less digits than its factorization.

16504441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146170.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 16504441 is about 4062.5658148515. The cubic root of 16504441 is about 254.6050068262.

The spelling of 16504441 in words is "sixteen million, five hundred four thousand, four hundred forty-one".