12543410045 has 4 divisors (see below), whose sum is σ = 15052092060. Its totient is φ = 10034728032.

The previous prime is 12543410041. The next prime is 12543410057. The reversal of 12543410045 is 54001434521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54001434521 = 131 ⋅412224691.

It can be written as a sum of positive squares in 2 ways, for example, as 3330097849 + 9213312196 = 57707^2 + 95986^2 .

It is a cyclic number.

It is not a de Polignac number, because 12543410045 - 2² = 12543410041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543410041) 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, 1254341000 + ... + 1254341009.

It is an arithmetic number, because the mean of its divisors is an integer number (3763023015).

Almost surely, 2^12543410045 is an apocalyptic number.

It is an amenable number.

12543410045 is a deficient number, since it is larger than the sum of its proper divisors (2508682015).

12543410045 is an equidigital number, since it uses as much as digits as its factorization.

12543410045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508682014.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 12543410045 its reverse (54001434521), we get a palindrome (66544844566).

The spelling of 12543410045 in words is "twelve billion, five hundred forty-three million, four hundred ten thousand, forty-five".