12643206324345 has 24 divisors (see below), whose sum is σ = 21996358979400. Its totient is φ = 6717976290816.

The previous prime is 12643206324299. The next prime is 12643206324347. The reversal of 12643206324345 is 54342360234621.

12643206324345 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 3 + 2 + 0 + 632 + 4 + 3 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 51382462329 + 12591823862016 = 226677^2 + 3548496^2 .

It is not a de Polignac number, because 12643206324345 - 2²³ = 12643197935737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12643206324345.

It is not an unprimeable number, because it can be changed into a prime (12643206324347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 522218640 + ... + 522242849.

It is an arithmetic number, because the mean of its divisors is an integer number (916514957475).

Almost surely, 2^{12643206324345} is an apocalyptic number.

12643206324345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12643206324345 is a deficient number, since it is larger than the sum of its proper divisors (9353152655055).

12643206324345 is a wasteful number, since it uses less digits than its factorization.

12643206324345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044461769 (or 1044461766 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 45.

Adding to 12643206324345 its reverse (54342360234621), we get a palindrome (66985566558966).

The spelling of 12643206324345 in words is "twelve trillion, six hundred forty-three billion, two hundred six million, three hundred twenty-four thousand, three hundred forty-five".