216646612 has 24 divisors (see below), whose sum is σ = 466624256. Its totient is φ = 85706208.

The previous prime is 216646609. The next prime is 216646649.

216646612 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297228 + ... + 297955.

Almost surely, 2^216646612 is an apocalyptic number.

It is an amenable number.

216646612 is an abundant number, since it is smaller than the sum of its proper divisors (249977644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216646612 is a wasteful number, since it uses less digits than its factorization.

216646612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595207 (or 595205 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 216646612 is about 14718.9202049607. The cubic root of 216646612 is about 600.5981183740.

The spelling of 216646612 in words is "two hundred sixteen million, six hundred forty-six thousand, six hundred twelve".