12216566215590 has 64 divisors (see below), whose sum is σ = 31987632851712. Its totient is φ = 2961365763200.

The previous prime is 12216566215561. The next prime is 12216566215591. The reversal of 12216566215590 is 9551266561221.

12216566215590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216566215591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2937580 + ... + 5750000.

It is an arithmetic number, because the mean of its divisors is an integer number (499806763308).

Almost surely, 2^{12216566215590} is an apocalyptic number.

12216566215590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12216566215590 is an abundant number, since it is smaller than the sum of its proper divisors (19771066636122).

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

12216566215590 is a wasteful number, since it uses less digits than its factorization.

12216566215590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825605.

The product of its (nonzero) digits is 1944000, while the sum is 51.

The spelling of 12216566215590 in words is "twelve trillion, two hundred sixteen billion, five hundred sixty-six million, two hundred fifteen thousand, five hundred ninety".