11816564 has 12 divisors (see below), whose sum is σ = 21895524. Its totient is φ = 5560704.

The previous prime is 11816557. The next prime is 11816573. The reversal of 11816564 is 46561811.

11816564 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 3579664 + 8236900 = 1892^2 + 2870^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11816564.

It is a congruent number.

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, 86819 + ... + 86954.

It is an arithmetic number, because the mean of its divisors is an integer number (1824627).

Almost surely, 2^11816564 is an apocalyptic number.

It is an amenable number.

11816564 is a deficient number, since it is larger than the sum of its proper divisors (10078960).

11816564 is a wasteful number, since it uses less digits than its factorization.

11816564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173794 (or 173792 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 11816564 is about 3437.5229453780. The cubic root of 11816564 is about 227.7702877745.

The spelling of 11816564 in words is "eleven million, eight hundred sixteen thousand, five hundred sixty-four".