12885985664 has 32 divisors (see below), whose sum is σ = 25680866400. Its totient is φ = 6440591872.

The previous prime is 12885985643. The next prime is 12885985699. The reversal of 12885985664 is 46658958821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 12885985597 and 12885985606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355049 + ... + 389655.

It is an arithmetic number, because the mean of its divisors is an integer number (802527075).

Almost surely, 2^12885985664 is an apocalyptic number.

It is an amenable number.

12885985664 is a deficient number, since it is larger than the sum of its proper divisors (12794880736).

12885985664 is an equidigital number, since it uses as much as digits as its factorization.

12885985664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37530 (or 37518 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 62.

The spelling of 12885985664 in words is "twelve billion, eight hundred eighty-five million, nine hundred eighty-five thousand, six hundred sixty-four".