12534563643023 has 4 divisors (see below), whose sum is σ = 13271890916160. Its totient is φ = 11797236369888.

The previous prime is 12534563643001. The next prime is 12534563643047. The reversal of 12534563643023 is 32034636543521.

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 12534563643023 - 2⁸ = 12534563642767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12534563643073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368663636543 + ... + 368663636576.

It is an arithmetic number, because the mean of its divisors is an integer number (3317972729040).

Almost surely, 2^{12534563643023} is an apocalyptic number.

12534563643023 is a deficient number, since it is larger than the sum of its proper divisors (737327273137).

12534563643023 is an equidigital number, since it uses as much as digits as its factorization.

12534563643023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737327273136.

The product of its (nonzero) digits is 4665600, while the sum is 47.

The spelling of 12534563643023 in words is "twelve trillion, five hundred thirty-four billion, five hundred sixty-three million, six hundred forty-three thousand, twenty-three".