12543631824 has 80 divisors (see below), whose sum is σ = 33500341952. Its totient is φ = 4041805824.

The previous prime is 12543631777. The next prime is 12543631843. The reversal of 12543631824 is 42813634521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168882 + ... + 231534.

Almost surely, 2^12543631824 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 12543631824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16750170976).

12543631824 is an abundant number, since it is smaller than the sum of its proper divisors (20956710128).

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

12543631824 is a wasteful number, since it uses less digits than its factorization.

12543631824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62804 (or 62798 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The spelling of 12543631824 in words is "twelve billion, five hundred forty-three million, six hundred thirty-one thousand, eight hundred twenty-four".