12128447544 has 32 divisors (see below), whose sum is σ = 30393165840. Its totient is φ = 4033209600.

The previous prime is 12128447531. The next prime is 12128447557. The reversal of 12128447544 is 44574482121.

12128447544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12128447531) and next prime (12128447557).

It is a junction number, because it is equal to n+sod(n) for n = 12128447496 and 12128447505.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 590077 + ... + 610284.

Almost surely, 2^12128447544 is an apocalyptic number.

It is an amenable number.

12128447544 is an abundant number, since it is smaller than the sum of its proper divisors (18264718296).

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

12128447544 is a wasteful number, since it uses less digits than its factorization.

12128447544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200791 (or 1200787 counting only the distinct ones).

The product of its digits is 286720, while the sum is 42.

The spelling of 12128447544 in words is "twelve billion, one hundred twenty-eight million, four hundred forty-seven thousand, five hundred forty-four".