12563564660 has 12 divisors (see below), whose sum is σ = 26383485828. Its totient is φ = 5025425856.

The previous prime is 12563564659. The next prime is 12563564669. The reversal of 12563564660 is 6646536521.

12563564660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3824680336 + 8738884324 = 61844^2 + 93482^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12563564669) 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 3 ways as a sum of consecutive naturals, for example, 314089097 + ... + 314089136.

It is an arithmetic number, because the mean of its divisors is an integer number (2198623819).

Almost surely, 2^12563564660 is an apocalyptic number.

12563564660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12563564660 is an abundant number, since it is smaller than the sum of its proper divisors (13819921168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12563564660 is a wasteful number, since it uses less digits than its factorization.

12563564660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628178242 (or 628178240 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 12563564660 in words is "twelve billion, five hundred sixty-three million, five hundred sixty-four thousand, six hundred sixty".