16004564 has 6 divisors (see below), whose sum is σ = 28007994. Its totient is φ = 8002280.

The previous prime is 16004551. The next prime is 16004567. The reversal of 16004564 is 46540061.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11628100 + 4376464 = 3410^2 + 2092^2 .

It is a super-2 number, since 2×16004564² = 512292137660192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16004567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000567 + ... + 2000574.

It is an arithmetic number, because the mean of its divisors is an integer number (4667999).

Almost surely, 2^16004564 is an apocalyptic number.

It is an amenable number.

16004564 is a deficient number, since it is larger than the sum of its proper divisors (12003430).

16004564 is a wasteful number, since it uses less digits than its factorization.

16004564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001145 (or 4001143 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 16004564 is about 4000.5704593220. The cubic root of 16004564 is about 252.0081671998.

The spelling of 16004564 in words is "sixteen million, four thousand, five hundred sixty-four".