12543445432 has 32 divisors (see below), whose sum is σ = 27745873920. Its totient is φ = 5202349920.

The previous prime is 12543445423. The next prime is 12543445451. The reversal of 12543445432 is 23454434521.

It is a junction number, because it is equal to n+sod(n) for n = 12543445391 and 12543445400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3611008 + ... + 3614479.

It is an arithmetic number, because the mean of its divisors is an integer number (867058560).

Almost surely, 2^12543445432 is an apocalyptic number.

It is an amenable number.

12543445432 is an abundant number, since it is smaller than the sum of its proper divisors (15202428488).

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

12543445432 is a wasteful number, since it uses less digits than its factorization.

12543445432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7225531 (or 7225527 counting only the distinct ones).

The product of its digits is 230400, while the sum is 37.

Adding to 12543445432 its reverse (23454434521), we get a palindrome (35997879953).

The spelling of 12543445432 in words is "twelve billion, five hundred forty-three million, four hundred forty-five thousand, four hundred thirty-two".