16582228561 has 4 divisors (see below), whose sum is σ = 16895100852. Its totient is φ = 16269356272.

The previous prime is 16582228529. The next prime is 16582228567.

16582228561 is nontrivially palindromic in base 10.

16582228561 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 9362497600 + 7219730961 = 96760^2 + 84969^2 .

It is a cyclic number.

It is not a de Polignac number, because 16582228561 - 2⁵ = 16582228529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16582228567) 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, 156436066 + ... + 156436171.

It is an arithmetic number, because the mean of its divisors is an integer number (4223775213).

Almost surely, 2^16582228561 is an apocalyptic number.

It is an amenable number.

16582228561 is a deficient number, since it is larger than the sum of its proper divisors (312872291).

16582228561 is an equidigital number, since it uses as much as digits as its factorization.

16582228561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312872290.

The product of its digits is 460800, while the sum is 46.

The spelling of 16582228561 in words is "sixteen billion, five hundred eighty-two million, two hundred twenty-eight thousand, five hundred sixty-one".