12517022605 has 4 divisors (see below), whose sum is σ = 15020427132. Its totient is φ = 10013618080.

The previous prime is 12517022519. The next prime is 12517022627. The reversal of 12517022605 is 50622071521.

12517022605 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 8110983721 + 4406038884 = 90061^2 + 66378^2 .

It is not a de Polignac number, because 12517022605 - 2¹¹ = 12517020557 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1251702256 + ... + 1251702265.

It is an arithmetic number, because the mean of its divisors is an integer number (3755106783).

Almost surely, 2^12517022605 is an apocalyptic number.

It is an amenable number.

12517022605 is a deficient number, since it is larger than the sum of its proper divisors (2503404527).

12517022605 is an equidigital number, since it uses as much as digits as its factorization.

12517022605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503404526.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 12517022605 in words is "twelve billion, five hundred seventeen million, twenty-two thousand, six hundred five".