16604303225 has 6 divisors (see below), whose sum is σ = 20589336030. Its totient is φ = 13283442560.

The previous prime is 16604303197. The next prime is 16604303231. The reversal of 16604303225 is 52230340661.

It can be written as a sum of positive squares in 3 ways, for example, as 1509477904 + 15094825321 = 38852^2 + 122861^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16604303225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16604303191 and 16604303200.

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, 332086040 + ... + 332086089.

It is an arithmetic number, because the mean of its divisors is an integer number (3431556005).

Almost surely, 2^16604303225 is an apocalyptic number.

It is an amenable number.

16604303225 is a deficient number, since it is larger than the sum of its proper divisors (3985032805).

16604303225 is an equidigital number, since it uses as much as digits as its factorization.

16604303225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664172139 (or 664172134 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 16604303225 its reverse (52230340661), we get a palindrome (68834643886).

The spelling of 16604303225 in words is "sixteen billion, six hundred four million, three hundred three thousand, two hundred twenty-five".