12681563852 has 6 divisors (see below), whose sum is σ = 22192736748. Its totient is φ = 6340781924.

The previous prime is 12681563833. The next prime is 12681563887. The reversal of 12681563852 is 25836518621.

It is a junction number, because it is equal to n+sod(n) for n = 12681563797 and 12681563806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1585195478 + ... + 1585195485.

It is an arithmetic number, because the mean of its divisors is an integer number (3698789458).

Almost surely, 2^12681563852 is an apocalyptic number.

It is an amenable number.

12681563852 is a deficient number, since it is larger than the sum of its proper divisors (9511172896).

12681563852 is a wasteful number, since it uses less digits than its factorization.

12681563852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170390967 (or 3170390965 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The spelling of 12681563852 in words is "twelve billion, six hundred eighty-one million, five hundred sixty-three thousand, eight hundred fifty-two".