12530555543 has 4 divisors (see below), whose sum is σ = 13669696968. Its totient is φ = 11391414120.

The previous prime is 12530555497. The next prime is 12530555591. The reversal of 12530555543 is 34555503521.

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 12530555543 - 2²⁰ = 12529506967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12530555497 and 12530555506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12530555243) 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, 569570696 + ... + 569570717.

It is an arithmetic number, because the mean of its divisors is an integer number (3417424242).

Almost surely, 2^12530555543 is an apocalyptic number.

12530555543 is a deficient number, since it is larger than the sum of its proper divisors (1139141425).

12530555543 is a wasteful number, since it uses less digits than its factorization.

12530555543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139141424.

The product of its (nonzero) digits is 225000, while the sum is 38.

The spelling of 12530555543 in words is "twelve billion, five hundred thirty million, five hundred fifty-five thousand, five hundred forty-three".