12536534563 has 8 divisors (see below), whose sum is σ = 14331301632. Its totient is φ = 10742725896.

The previous prime is 12536534561. The next prime is 12536534573. The reversal of 12536534563 is 36543563521.

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

It is not a de Polignac number, because 12536534563 - 2¹ = 12536534561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12536534561) 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, 211345 + ... + 264082.

It is an arithmetic number, because the mean of its divisors is an integer number (1791412704).

Almost surely, 2^12536534563 is an apocalyptic number.

12536534563 is a deficient number, since it is larger than the sum of its proper divisors (1794767069).

12536534563 is an equidigital number, since it uses as much as digits as its factorization.

12536534563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479201.

The product of its digits is 972000, while the sum is 43.

The spelling of 12536534563 in words is "twelve billion, five hundred thirty-six million, five hundred thirty-four thousand, five hundred sixty-three".