12515997183 has 4 divisors (see below), whose sum is σ = 16687996248. Its totient is φ = 8343998120.

The previous prime is 12515997127. The next prime is 12515997187. The reversal of 12515997183 is 38179951521.

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 12515997183 - 2⁶ = 12515997119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515997187) 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, 2085999528 + ... + 2085999533.

It is an arithmetic number, because the mean of its divisors is an integer number (4171999062).

Almost surely, 2^12515997183 is an apocalyptic number.

12515997183 is a deficient number, since it is larger than the sum of its proper divisors (4171999065).

12515997183 is an equidigital number, since it uses as much as digits as its factorization.

12515997183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171999064.

The product of its digits is 680400, while the sum is 51.

The spelling of 12515997183 in words is "twelve billion, five hundred fifteen million, nine hundred ninety-seven thousand, one hundred eighty-three".