12673217563 has 4 divisors (see below), whose sum is σ = 12750967528. Its totient is φ = 12595467600.

The previous prime is 12673217561. The next prime is 12673217581. The reversal of 12673217563 is 36571237621.

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 12673217563 - 2¹ = 12673217561 is a prime.

It is a super-2 number, since 2×12673217563² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12673217561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38874738 + ... + 38875063.

It is an arithmetic number, because the mean of its divisors is an integer number (3187741882).

Almost surely, 2^12673217563 is an apocalyptic number.

12673217563 is a deficient number, since it is larger than the sum of its proper divisors (77749965).

12673217563 is an equidigital number, since it uses as much as digits as its factorization.

12673217563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77749964.

The product of its digits is 317520, while the sum is 43.

The spelling of 12673217563 in words is "twelve billion, six hundred seventy-three million, two hundred seventeen thousand, five hundred sixty-three".