16564601 has 2 divisors, whose sum is σ = 16564602. Its totient is φ = 16564600.

The previous prime is 16564573. The next prime is 16564627. The reversal of 16564601 is 10646561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 724201 = 3980^2 + 851^2 .

It is an emirp because it is prime and its reverse (10646561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16564601 - 2¹⁰ = 16563577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16564661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282300 + 8282301.

It is an arithmetic number, because the mean of its divisors is an integer number (8282301).

Almost surely, 2^16564601 is an apocalyptic number.

It is an amenable number.

16564601 is a deficient number, since it is larger than the sum of its proper divisors (1).

16564601 is an equidigital number, since it uses as much as digits as its factorization.

16564601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16564601 is about 4069.9632676475. The cubic root of 16564601 is about 254.9139835475.

The spelling of 16564601 in words is "sixteen million, five hundred sixty-four thousand, six hundred one".