12644555232 has 96 divisors (see below), whose sum is σ = 34882227072. Its totient is φ = 4005517824.

The previous prime is 12644555111. The next prime is 12644555303. The reversal of 12644555232 is 23255544621.

12644555232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 111343 + ... + 194129.

It is an arithmetic number, because the mean of its divisors is an integer number (363356532).

Almost surely, 2^12644555232 is an apocalyptic number.

12644555232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12644555232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17441113536).

12644555232 is an abundant number, since it is smaller than the sum of its proper divisors (22237671840).

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

12644555232 is a wasteful number, since it uses less digits than its factorization.

12644555232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82880 (or 82872 counting only the distinct ones).

The product of its digits is 288000, while the sum is 39.

The spelling of 12644555232 in words is "twelve billion, six hundred forty-four million, five hundred fifty-five thousand, two hundred thirty-two".