12643560005 has 16 divisors (see below), whose sum is σ = 15500782080. Its totient is φ = 9895999872.

The previous prime is 12643560001. The next prime is 12643560019. The reversal of 12643560005 is 50006534621.

It is a cyclic number.

It is not a de Polignac number, because 12643560005 - 2² = 12643560001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643560001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757136 + ... + 773654.

It is an arithmetic number, because the mean of its divisors is an integer number (968798880).

Almost surely, 2^12643560005 is an apocalyptic number.

It is an amenable number.

12643560005 is a deficient number, since it is larger than the sum of its proper divisors (2857222075).

12643560005 is a wasteful number, since it uses less digits than its factorization.

12643560005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19828.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 12643560005 in words is "twelve billion, six hundred forty-three million, five hundred sixty thousand, five".