12640244132 has 24 divisors (see below), whose sum is σ = 22371810552. Its totient is φ = 6248480000.

The previous prime is 12640244129. The next prime is 12640244167. The reversal of 12640244132 is 23144204621.

12640244132 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 4 ways, for example, as 10091407936 + 2548836196 = 100456^2 + 50486^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12640244095 and 12640244104.

It is an unprimeable number.

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, 260888 + ... + 305520.

It is an arithmetic number, because the mean of its divisors is an integer number (932158773).

Almost surely, 2^12640244132 is an apocalyptic number.

It is an amenable number.

12640244132 is a deficient number, since it is larger than the sum of its proper divisors (9731566420).

12640244132 is a wasteful number, since it uses less digits than its factorization.

12640244132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45439 (or 45437 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 12640244132 its reverse (23144204621), we get a palindrome (35784448753).

The spelling of 12640244132 in words is "twelve billion, six hundred forty million, two hundred forty-four thousand, one hundred thirty-two".