12547566338 has 8 divisors (see below), whose sum is σ = 19015384332. Its totient is φ = 6209104896.

The previous prime is 12547566331. The next prime is 12547566347. The reversal of 12547566338 is 83366574521.

12547566338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11883834169 + 663732169 = 109013^2 + 25763^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12547566331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32338895 + ... + 32339282.

Almost surely, 2^12547566338 is an apocalyptic number.

12547566338 is a deficient number, since it is larger than the sum of its proper divisors (6467817994).

12547566338 is an equidigital number, since it uses as much as digits as its factorization.

12547566338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64678276.

The product of its digits is 3628800, while the sum is 50.

The spelling of 12547566338 in words is "twelve billion, five hundred forty-seven million, five hundred sixty-six thousand, three hundred thirty-eight".