16561344 has 28 divisors (see below), whose sum is σ = 43819064. Its totient is φ = 5520384.

The previous prime is 16561339. The next prime is 16561361. The reversal of 16561344 is 44316561.

16561344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42937 + ... + 43320.

Almost surely, 2^16561344 is an apocalyptic number.

It is an amenable number.

16561344 is an abundant number, since it is smaller than the sum of its proper divisors (27257720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16561344 is an equidigital number, since it uses as much as digits as its factorization.

16561344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86272 (or 86262 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 16561344 is about 4069.5631215156. The cubic root of 16561344 is about 254.8972750403.

The spelling of 16561344 in words is "sixteen million, five hundred sixty-one thousand, three hundred forty-four".