12543551743 has 4 divisors (see below), whose sum is σ = 12976088040. Its totient is φ = 12111015448.

The previous prime is 12543551723. The next prime is 12543551789. The reversal of 12543551743 is 34715534521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12543551743 - 2⁹ = 12543551231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12543551696 and 12543551705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543551723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216268105 + ... + 216268162.

It is an arithmetic number, because the mean of its divisors is an integer number (3244022010).

Almost surely, 2^12543551743 is an apocalyptic number.

12543551743 is a deficient number, since it is larger than the sum of its proper divisors (432536297).

12543551743 is an equidigital number, since it uses as much as digits as its factorization.

12543551743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432536296.

The product of its digits is 252000, while the sum is 40.

The spelling of 12543551743 in words is "twelve billion, five hundred forty-three million, five hundred fifty-one thousand, seven hundred forty-three".