12641664563 has 8 divisors (see below), whose sum is σ = 13791720960. Its totient is φ = 11491743880.

The previous prime is 12641664517. The next prime is 12641664577. The reversal of 12641664563 is 36546614621.

12641664563 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 cyclic number.

It is not a de Polignac number, because 12641664563 - 2¹² = 12641660467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12641664863) 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, 341978 + ... + 377136.

It is an arithmetic number, because the mean of its divisors is an integer number (1723965120).

Almost surely, 2^12641664563 is an apocalyptic number.

12641664563 is a deficient number, since it is larger than the sum of its proper divisors (1150056397).

12641664563 is a wasteful number, since it uses less digits than its factorization.

12641664563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67857.

The product of its digits is 622080, while the sum is 44.

The spelling of 12641664563 in words is "twelve billion, six hundred forty-one million, six hundred sixty-four thousand, five hundred sixty-three".