12505503144 has 128 divisors (see below), whose sum is σ = 36360576000. Its totient is φ = 3555154944.

The previous prime is 12505503139. The next prime is 12505503149. The reversal of 12505503144 is 44130550521.

12505503144 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 (12505503139) and next prime (12505503149).

It is not an unprimeable number, because it can be changed into a prime (12505503149) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 143227 + ... + 213365.

It is an arithmetic number, because the mean of its divisors is an integer number (284067000).

Almost surely, 2^12505503144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12505503144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18180288000).

12505503144 is an abundant number, since it is smaller than the sum of its proper divisors (23855072856).

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

12505503144 is a wasteful number, since it uses less digits than its factorization.

12505503144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70207 (or 70203 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 12505503144 in words is "twelve billion, five hundred five million, five hundred three thousand, one hundred forty-four".