16809200452 has 18 divisors (see below), whose sum is σ = 32333400974. Its totient is φ = 7640545440.

The previous prime is 16809200389. The next prime is 16809200453. The reversal of 16809200452 is 25400290861.

It can be written as a sum of positive squares in only one way, i.e., 16808085316 + 1115136 = 129646^2 + 1056^2 .

It is not an unprimeable number, because it can be changed into a prime (16809200453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17364393 + ... + 17365360.

Almost surely, 2^16809200452 is an apocalyptic number.

It is an amenable number.

16809200452 is a deficient number, since it is larger than the sum of its proper divisors (15524200522).

16809200452 is a wasteful number, since it uses less digits than its factorization.

16809200452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34729779 (or 34729766 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 16809200452 in words is "sixteen billion, eight hundred nine million, two hundred thousand, four hundred fifty-two".