16564396 has 24 divisors (see below), whose sum is σ = 29536416. Its totient is φ = 8127360.

The previous prime is 16564391. The next prime is 16564397. The reversal of 16564396 is 69346561.

16564396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16564391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91426 + ... + 91606.

It is an arithmetic number, because the mean of its divisors is an integer number (1230684).

Almost surely, 2^16564396 is an apocalyptic number.

It is an amenable number.

16564396 is a deficient number, since it is larger than the sum of its proper divisors (12972020).

16564396 is a wasteful number, since it uses less digits than its factorization.

16564396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 487 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 16564396 is about 4069.9380830671. The cubic root of 16564396 is about 254.9129319560.

The spelling of 16564396 in words is "sixteen million, five hundred sixty-four thousand, three hundred ninety-six".