12444128920 has 16 divisors (see below), whose sum is σ = 27999290160. Its totient is φ = 4977651552.

The previous prime is 12444128849. The next prime is 12444128923. The reversal of 12444128920 is 2982144421.

It is a self number, because there is not a number n which added to its sum of digits gives 12444128920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444128923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155551572 + ... + 155551651.

It is an arithmetic number, because the mean of its divisors is an integer number (1749955635).

Almost surely, 2^12444128920 is an apocalyptic number.

12444128920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12444128920 is an abundant number, since it is smaller than the sum of its proper divisors (15555161240).

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

12444128920 is a wasteful number, since it uses less digits than its factorization.

12444128920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311103234 (or 311103230 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 12444128920 in words is "twelve billion, four hundred forty-four million, one hundred twenty-eight thousand, nine hundred twenty".