12660135564 has 12 divisors (see below), whose sum is σ = 29540316344. Its totient is φ = 4220045184.

The previous prime is 12660135559. The next prime is 12660135583. The reversal of 12660135564 is 46553106621.

12660135564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 527505637 + ... + 527505660.

Almost surely, 2^12660135564 is an apocalyptic number.

It is an amenable number.

12660135564 is an abundant number, since it is smaller than the sum of its proper divisors (16880180780).

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

12660135564 is a wasteful number, since it uses less digits than its factorization.

12660135564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055011304 (or 1055011302 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

It can be divided in two parts, 126601 and 35564, that added together give a triangular number (162165 = T₅₆₉).

The spelling of 12660135564 in words is "twelve billion, six hundred sixty million, one hundred thirty-five thousand, five hundred sixty-four".