12543240553 has 8 divisors (see below), whose sum is σ = 12949629440. Its totient is φ = 12136962240.

The previous prime is 12543240539. The next prime is 12543240557. The reversal of 12543240553 is 35504234521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12543240553 - 2²⁵ = 12509686121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12543240557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246076 + ... + 292642.

It is an arithmetic number, because the mean of its divisors is an integer number (1618703680).

Almost surely, 2^12543240553 is an apocalyptic number.

It is an amenable number.

12543240553 is a deficient number, since it is larger than the sum of its proper divisors (406388887).

12543240553 is an equidigital number, since it uses as much as digits as its factorization.

12543240553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55287.

The product of its (nonzero) digits is 72000, while the sum is 34.

The spelling of 12543240553 in words is "twelve billion, five hundred forty-three million, two hundred forty thousand, five hundred fifty-three".