12516572197 has 4 divisors (see below), whose sum is σ = 12547785996. Its totient is φ = 12485358400.

The previous prime is 12516572191. The next prime is 12516572207. The reversal of 12516572197 is 79127561521.

12516572197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7474294116 + 5042278081 = 86454^2 + 71009^2 .

It is a cyclic number.

It is not a de Polignac number, because 12516572197 - 2³¹ = 10369088549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12516572191) 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, 15606298 + ... + 15607099.

It is an arithmetic number, because the mean of its divisors is an integer number (3136946499).

Almost surely, 2^12516572197 is an apocalyptic number.

It is an amenable number.

12516572197 is a deficient number, since it is larger than the sum of its proper divisors (31213799).

12516572197 is an equidigital number, since it uses as much as digits as its factorization.

12516572197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31213798.

The product of its digits is 264600, while the sum is 46.

The spelling of 12516572197 in words is "twelve billion, five hundred sixteen million, five hundred seventy-two thousand, one hundred ninety-seven".