12561682386 has 32 divisors (see below), whose sum is σ = 27990448128. Its totient is φ = 3725578640.

The previous prime is 12561682333. The next prime is 12561682387. The reversal of 12561682386 is 68328616521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12561682387) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 2021670 + ... + 2027873.

It is an arithmetic number, because the mean of its divisors is an integer number (874701504).

Almost surely, 2^12561682386 is an apocalyptic number.

12561682386 is an abundant number, since it is smaller than the sum of its proper divisors (15428765742).

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

12561682386 is a wasteful number, since it uses less digits than its factorization.

12561682386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049606.

The product of its digits is 829440, while the sum is 48.

The spelling of 12561682386 in words is "twelve billion, five hundred sixty-one million, six hundred eighty-two thousand, three hundred eighty-six".