12244445666778 has 32 divisors (see below), whose sum is σ = 26383316855616. Its totient is φ = 3765998222208.

The previous prime is 12244445666767. The next prime is 12244445666797. The reversal of 12244445666778 is 87766654444221.

It is a happy number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31545900 + ... + 31931687.

It is an arithmetic number, because the mean of its divisors is an integer number (824478651738).

Almost surely, 2^{12244445666778} is an apocalyptic number.

12244445666778 is an abundant number, since it is smaller than the sum of its proper divisors (14138871188838).

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

12244445666778 is a wasteful number, since it uses less digits than its factorization.

12244445666778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63480078.

The product of its digits is 433520640, while the sum is 66.

The spelling of 12244445666778 in words is "twelve trillion, two hundred forty-four billion, four hundred forty-five million, six hundred sixty-six thousand, seven hundred seventy-eight".