16601033616225 has 48 divisors (see below), whose sum is σ = 27632768949120. Its totient is φ = 8793989568000.

The previous prime is 16601033616221. The next prime is 16601033616227. The reversal of 16601033616225 is 52261633010661.

It is not a de Polignac number, because 16601033616225 - 2² = 16601033616221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16601033616221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81767037 + ... + 81969813.

It is an arithmetic number, because the mean of its divisors is an integer number (575682686440).

Almost surely, 2^{16601033616225} is an apocalyptic number.

16601033616225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16601033616225 is a deficient number, since it is larger than the sum of its proper divisors (11031735332895).

16601033616225 is a wasteful number, since it uses less digits than its factorization.

16601033616225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210170 (or 210165 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

Adding to 16601033616225 its reverse (52261633010661), we get a palindrome (68862666626886).

The spelling of 16601033616225 in words is "sixteen trillion, six hundred one billion, thirty-three million, six hundred sixteen thousand, two hundred twenty-five".