12566861608 has 32 divisors (see below), whose sum is σ = 26934667200. Its totient is φ = 5384662272.

The previous prime is 12566861603. The next prime is 12566861609. The reversal of 12566861608 is 80616866521.

It is not an unprimeable number, because it can be changed into a prime (12566861603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278448 + ... + 320416.

It is an arithmetic number, because the mean of its divisors is an integer number (841708350).

Almost surely, 2^12566861608 is an apocalyptic number.

It is an amenable number.

12566861608 is an abundant number, since it is smaller than the sum of its proper divisors (14367805592).

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

12566861608 is a wasteful number, since it uses less digits than its factorization.

12566861608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47329 (or 47325 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 12566861608 in words is "twelve billion, five hundred sixty-six million, eight hundred sixty-one thousand, six hundred eight".