12542566315 has 4 divisors (see below), whose sum is σ = 15051079584. Its totient is φ = 10034053048.

The previous prime is 12542566313. The next prime is 12542566369. The reversal of 12542566315 is 51366524521.

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 12542566315 - 2¹ = 12542566313 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12542566313) 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, 1254256627 + ... + 1254256636.

It is an arithmetic number, because the mean of its divisors is an integer number (3762769896).

Almost surely, 2^12542566315 is an apocalyptic number.

12542566315 is a deficient number, since it is larger than the sum of its proper divisors (2508513269).

12542566315 is an equidigital number, since it uses as much as digits as its factorization.

12542566315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508513268.

The product of its digits is 216000, while the sum is 40.

The spelling of 12542566315 in words is "twelve billion, five hundred forty-two million, five hundred sixty-six thousand, three hundred fifteen".