12513187568818 has 4 divisors (see below), whose sum is σ = 18769781353230. Its totient is φ = 6256593784408.

The previous prime is 12513187568789. The next prime is 12513187568851. The reversal of 12513187568818 is 81886578131521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6321267009369 + 6191920559449 = 2514213^2 + 2488357^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12513187568818.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3128296892203 + ... + 3128296892206.

Almost surely, 2^{12513187568818} is an apocalyptic number.

12513187568818 is a deficient number, since it is larger than the sum of its proper divisors (6256593784412).

12513187568818 is an equidigital number, since it uses as much as digits as its factorization.

12513187568818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6256593784411.

The product of its digits is 25804800, while the sum is 64.

The spelling of 12513187568818 in words is "twelve trillion, five hundred thirteen billion, one hundred eighty-seven million, five hundred sixty-eight thousand, eight hundred eighteen".