12543325543 has 16 divisors (see below), whose sum is σ = 15701878080. Its totient is φ = 9770052096.

The previous prime is 12543325537. The next prime is 12543325559. The reversal of 12543325543 is 34552334521.

It is not a de Polignac number, because 12543325543 - 2⁹ = 12543325031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543325573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1813896 + ... + 1820797.

It is an arithmetic number, because the mean of its divisors is an integer number (981367380).

Almost surely, 2^12543325543 is an apocalyptic number.

12543325543 is a deficient number, since it is larger than the sum of its proper divisors (3158552537).

12543325543 is a wasteful number, since it uses less digits than its factorization.

12543325543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634746.

The product of its digits is 216000, while the sum is 37.

The spelling of 12543325543 in words is "twelve billion, five hundred forty-three million, three hundred twenty-five thousand, five hundred forty-three".