12405336643 has 8 divisors (see below), whose sum is σ = 14507237888. Its totient is φ = 10385862984.

The previous prime is 12405336623. The next prime is 12405336689. The reversal of 12405336643 is 34663350421.

12405336643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12405336643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12405336613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20606571 + ... + 20607172.

It is an arithmetic number, because the mean of its divisors is an integer number (1813404736).

Almost surely, 2^12405336643 is an apocalyptic number.

12405336643 is a deficient number, since it is larger than the sum of its proper divisors (2101901245).

12405336643 is an equidigital number, since it uses as much as digits as its factorization.

12405336643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41213793.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 12405336643 in words is "twelve billion, four hundred five million, three hundred thirty-six thousand, six hundred forty-three".