12561333688 has 32 divisors (see below), whose sum is σ = 24229951200. Its totient is φ = 6102315648.

The previous prime is 12561333667. The next prime is 12561333749. The reversal of 12561333688 is 88633316521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100143 + ... + 187486.

It is an arithmetic number, because the mean of its divisors is an integer number (757185975).

Almost surely, 2^12561333688 is an apocalyptic number.

It is an amenable number.

12561333688 is a deficient number, since it is larger than the sum of its proper divisors (11668617512).

12561333688 is a wasteful number, since it uses less digits than its factorization.

12561333688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287791 (or 287787 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The spelling of 12561333688 in words is "twelve billion, five hundred sixty-one million, three hundred thirty-three thousand, six hundred eighty-eight".