12317213045545 has 4 divisors (see below), whose sum is σ = 14780655654660. Its totient is φ = 9853770436432.

The previous prime is 12317213045531. The next prime is 12317213045549. The reversal of 12317213045545 is 54554031271321.

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 4915053528064 + 7402159517481 = 2216992^2 + 2720691^2 .

It is a cyclic number.

It is not a de Polignac number, because 12317213045545 - 2²⁷ = 12317078827817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12317213045549) 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, 1231721304550 + ... + 1231721304559.

It is an arithmetic number, because the mean of its divisors is an integer number (3695163913665).

Almost surely, 2^{12317213045545} is an apocalyptic number.

It is an amenable number.

12317213045545 is a deficient number, since it is larger than the sum of its proper divisors (2463442609115).

12317213045545 is an equidigital number, since it uses as much as digits as its factorization.

12317213045545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463442609114.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 12317213045545 in words is "twelve trillion, three hundred seventeen billion, two hundred thirteen million, forty-five thousand, five hundred forty-five".