16180564025 has 6 divisors (see below), whose sum is σ = 20063899422. Its totient is φ = 12944451200.

The previous prime is 16180564019. The next prime is 16180564039. The reversal of 16180564025 is 52046508161.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 699232249 + 15481331776 = 26443^2 + 124424^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16180564025 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16180564025.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323611256 + ... + 323611305.

It is an arithmetic number, because the mean of its divisors is an integer number (3343983237).

Almost surely, 2^16180564025 is an apocalyptic number.

It is an amenable number.

16180564025 is a deficient number, since it is larger than the sum of its proper divisors (3883335397).

16180564025 is an equidigital number, since it uses as much as digits as its factorization.

16180564025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647222571 (or 647222566 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 16180564025 in words is "sixteen billion, one hundred eighty million, five hundred sixty-four thousand, twenty-five".