12561107882 has 8 divisors (see below), whose sum is σ = 18901100196. Its totient is φ = 6260741152.

The previous prime is 12561107863. The next prime is 12561107947. The reversal of 12561107882 is 28870116521.

It can be written as a sum of positive squares in 2 ways, for example, as 12544224001 + 16883881 = 112001^2 + 4109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 9905603 + ... + 9906870.

Almost surely, 2^12561107882 is an apocalyptic number.

12561107882 is a deficient number, since it is larger than the sum of its proper divisors (6339992314).

12561107882 is a wasteful number, since it uses less digits than its factorization.

12561107882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19812792.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 12561107882 in words is "twelve billion, five hundred sixty-one million, one hundred seven thousand, eight hundred eighty-two".