12431310205445 has 4 divisors (see below), whose sum is σ = 14917572246540. Its totient is φ = 9945048164352.

The previous prime is 12431310205427. The next prime is 12431310205453. The reversal of 12431310205445 is 54450201313421.

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 6778071661729 + 5653238543716 = 2603473^2 + 2377654^2 .

It is a cyclic number.

It is not a de Polignac number, because 12431310205445 - 2³² = 12427015238149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243131020540 + ... + 1243131020549.

It is an arithmetic number, because the mean of its divisors is an integer number (3729393061635).

Almost surely, 2^{12431310205445} is an apocalyptic number.

It is an amenable number.

12431310205445 is a deficient number, since it is larger than the sum of its proper divisors (2486262041095).

12431310205445 is an equidigital number, since it uses as much as digits as its factorization.

12431310205445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486262041094.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 12431310205445 its reverse (54450201313421), we get a palindrome (66881511518866).

The spelling of 12431310205445 in words is "twelve trillion, four hundred thirty-one billion, three hundred ten million, two hundred five thousand, four hundred forty-five".