16516564 has 6 divisors (see below), whose sum is σ = 28903994. Its totient is φ = 8258280.

The previous prime is 16516471. The next prime is 16516579. The reversal of 16516564 is 46561561.

It is a happy number.

16516564 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 only one way, i.e., 15147664 + 1368900 = 3892^2 + 1170^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064567 + ... + 2064574.

Almost surely, 2^16516564 is an apocalyptic number.

It is an amenable number.

16516564 is a deficient number, since it is larger than the sum of its proper divisors (12387430).

16516564 is a wasteful number, since it uses less digits than its factorization.

16516564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129145 (or 4129143 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 16516564 is about 4064.0575783323. The cubic root of 16516564 is about 254.6673298717.

The spelling of 16516564 in words is "sixteen million, five hundred sixteen thousand, five hundred sixty-four".