16564573000625 has 40 divisors (see below), whose sum is σ = 22835019535944. Its totient is φ = 11933951040000.

The previous prime is 16564573000601. The next prime is 16564573000631. The reversal of 16564573000625 is 52600037546561.

It is a happy number.

It can be written as a sum of positive squares in 20 ways, for example, as 14132847759424 + 2431725241201 = 3759368^2 + 1559399^2 .

It is not a de Polignac number, because 16564573000625 - 2²⁶ = 16564505891761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24529274 + ... + 25195523.

Almost surely, 2^{16564573000625} is an apocalyptic number.

It is an amenable number.

16564573000625 is a deficient number, since it is larger than the sum of its proper divisors (6270446535319).

16564573000625 is an equidigital number, since it uses as much as digits as its factorization.

16564573000625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49724871 (or 49724856 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 16564573000625 in words is "sixteen trillion, five hundred sixty-four billion, five hundred seventy-three million, six hundred twenty-five", and thus it is an aban number.