12986446644 has 72 divisors (see below), whose sum is σ = 33055102080. Its totient is φ = 4298788800.

The previous prime is 12986446639. The next prime is 12986446673. The reversal of 12986446644 is 44664468921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8593849 + ... + 8595359.

It is an arithmetic number, because the mean of its divisors is an integer number (459098640).

Almost surely, 2^12986446644 is an apocalyptic number.

It is an amenable number.

12986446644 is an abundant number, since it is smaller than the sum of its proper divisors (20068655436).

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

12986446644 is a wasteful number, since it uses less digits than its factorization.

12986446644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021 (or 3016 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 54.

The spelling of 12986446644 in words is "twelve billion, nine hundred eighty-six million, four hundred forty-six thousand, six hundred forty-four".