12643824357 has 12 divisors (see below), whose sum is σ = 18939720800. Its totient is φ = 8429216076.

The previous prime is 12643824353. The next prime is 12643824367. The reversal of 12643824357 is 75342834621.

12643824357 is a `hidden beast` number, since 1 + 264 + 38 + 2 + 4 + 357 = 666.

It is not a de Polignac number, because 12643824357 - 2² = 12643824353 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 (12643824353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26015857 + ... + 26016342.

Almost surely, 2^12643824357 is an apocalyptic number.

It is an amenable number.

12643824357 is a deficient number, since it is larger than the sum of its proper divisors (6295896443).

12643824357 is an frugal number, since it uses more digits than its factorization.

12643824357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52032214 (or 52032202 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 12643824357 in words is "twelve billion, six hundred forty-three million, eight hundred twenty-four thousand, three hundred fifty-seven".