12440431411423 has 4 divisors (see below), whose sum is σ = 12529930918120. Its totient is φ = 12350931904728.

The previous prime is 12440431411409. The next prime is 12440431411427. The reversal of 12440431411423 is 32411413404421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12440431411423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440431411427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44749753140 + ... + 44749753417.

It is an arithmetic number, because the mean of its divisors is an integer number (3132482729530).

Almost surely, 2^{12440431411423} is an apocalyptic number.

12440431411423 is a deficient number, since it is larger than the sum of its proper divisors (89499506697).

12440431411423 is an equidigital number, since it uses as much as digits as its factorization.

12440431411423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89499506696.

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 12440431411423 its reverse (32411413404421), we get a palindrome (44851844815844).

The spelling of 12440431411423 in words is "twelve trillion, four hundred forty billion, four hundred thirty-one million, four hundred eleven thousand, four hundred twenty-three".