12432140544 has 72 divisors (see below), whose sum is σ = 33110592480. Its totient is φ = 4141170688.

The previous prime is 12432140537. The next prime is 12432140549. The reversal of 12432140544 is 44504123421.

It is not an unprimeable number, because it can be changed into a prime (12432140549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298527 + ... + 1308065.

It is an arithmetic number, because the mean of its divisors is an integer number (459869340).

Almost surely, 2^12432140544 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 12432140544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16555296240).

12432140544 is an abundant number, since it is smaller than the sum of its proper divisors (20678451936).

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

12432140544 is an equidigital number, since it uses as much as digits as its factorization.

12432140544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11255 (or 11241 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 12432140544 its reverse (44504123421), we get a palindrome (56936263965).

The spelling of 12432140544 in words is "twelve billion, four hundred thirty-two million, one hundred forty thousand, five hundred forty-four".