18564532785704 has 32 divisors (see below), whose sum is σ = 35163601851240. Its totient is φ = 9187627008000.

The previous prime is 18564532785629. The next prime is 18564532785707. The reversal of 18564532785704 is 40758723546581.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18076085553604 + 488447232100 = 4251598^2 + 698890^2 .

It is not an unprimeable number, because it can be changed into a prime (18564532785707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702329 + ... + 6133704.

Almost surely, 2^{18564532785704} is an apocalyptic number.

It is an amenable number.

18564532785704 is a deficient number, since it is larger than the sum of its proper divisors (16599069065536).

18564532785704 is a wasteful number, since it uses less digits than its factorization.

18564532785704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839501 (or 6839497 counting only the distinct ones).

The product of its (nonzero) digits is 225792000, while the sum is 65.

The spelling of 18564532785704 in words is "eighteen trillion, five hundred sixty-four billion, five hundred thirty-two million, seven hundred eighty-five thousand, seven hundred four".