12216537276 has 12 divisors (see below), whose sum is σ = 28505253672. Its totient is φ = 4072179088.

The previous prime is 12216537247. The next prime is 12216537287. The reversal of 12216537276 is 67273561221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509022375 + ... + 509022398.

It is an arithmetic number, because the mean of its divisors is an integer number (2375437806).

Almost surely, 2^12216537276 is an apocalyptic number.

It is an amenable number.

12216537276 is an abundant number, since it is smaller than the sum of its proper divisors (16288716396).

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

12216537276 is a wasteful number, since it uses less digits than its factorization.

12216537276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018044780 (or 1018044778 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The spelling of 12216537276 in words is "twelve billion, two hundred sixteen million, five hundred thirty-seven thousand, two hundred seventy-six".