12216566215604 has 24 divisors (see below), whose sum is σ = 21390863659200. Its totient is φ = 6104891281280.

The previous prime is 12216566215591. The next prime is 12216566215621. The reversal of 12216566215604 is 40651266561221.

12216566215604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 156645932 + ... + 156723900.

It is an arithmetic number, because the mean of its divisors is an integer number (891285985800).

Almost surely, 2^{12216566215604} is an apocalyptic number.

It is an amenable number.

12216566215604 is a deficient number, since it is larger than the sum of its proper divisors (9174297443596).

12216566215604 is a wasteful number, since it uses less digits than its factorization.

12216566215604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99223 (or 99221 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 12216566215604 in words is "twelve trillion, two hundred sixteen billion, five hundred sixty-six million, two hundred fifteen thousand, six hundred four".