12661646244 has 48 divisors (see below), whose sum is σ = 31831356480. Its totient is φ = 3894065280.

The previous prime is 12661646243. The next prime is 12661646267. The reversal of 12661646244 is 44264616621.

12661646244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12661646196 and 12661646205.

It is not an unprimeable number, because it can be changed into a prime (12661646243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336079 + ... + 371849.

It is an arithmetic number, because the mean of its divisors is an integer number (663153260).

Almost surely, 2^12661646244 is an apocalyptic number.

It is an amenable number.

12661646244 is an abundant number, since it is smaller than the sum of its proper divisors (19169710236).

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

12661646244 is a wasteful number, since it uses less digits than its factorization.

12661646244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38060 (or 38058 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The spelling of 12661646244 in words is "twelve billion, six hundred sixty-one million, six hundred forty-six thousand, two hundred forty-four".