12216549208 has 8 divisors (see below), whose sum is σ = 22906029780. Its totient is φ = 6108274600.

The previous prime is 12216549203. The next prime is 12216549209. The reversal of 12216549208 is 80294561221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216549203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763534318 + ... + 763534333.

Almost surely, 2^12216549208 is an apocalyptic number.

It is an amenable number.

12216549208 is a deficient number, since it is larger than the sum of its proper divisors (10689480572).

12216549208 is a wasteful number, since it uses less digits than its factorization.

12216549208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527068657 (or 1527068653 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 12216549208 in words is "twelve billion, two hundred sixteen million, five hundred forty-nine thousand, two hundred eight".