12405313643 has 4 divisors (see below), whose sum is σ = 12406341768. Its totient is φ = 12404285520.

The previous prime is 12405313637. The next prime is 12405313663. The reversal of 12405313643 is 34631350421.

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-12405313643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12405313633) 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, 495746 + ... + 520167.

It is an arithmetic number, because the mean of its divisors is an integer number (3101585442).

Almost surely, 2^12405313643 is an apocalyptic number.

12405313643 is a deficient number, since it is larger than the sum of its proper divisors (1028125).

12405313643 is a wasteful number, since it uses less digits than its factorization.

12405313643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028124.

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 12405313643 in words is "twelve billion, four hundred five million, three hundred thirteen thousand, six hundred forty-three".