216646604 has 12 divisors (see below), whose sum is σ = 379397928. Its totient is φ = 108247200.

The previous prime is 216646603. The next prime is 216646609. The reversal of 216646604 is 406646612.

It is not an unprimeable number, because it can be changed into a prime (216646601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12362 + ... + 24209.

It is an arithmetic number, because the mean of its divisors is an integer number (31616494).

Almost surely, 2^216646604 is an apocalyptic number.

It is an amenable number.

216646604 is a deficient number, since it is larger than the sum of its proper divisors (162751324).

216646604 is a wasteful number, since it uses less digits than its factorization.

216646604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38056 (or 38054 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 216646604 is about 14718.9199332016. The cubic root of 216646604 is about 600.5981109814.

The spelling of 216646604 in words is "two hundred sixteen million, six hundred forty-six thousand, six hundred four".