12566756776 has 48 divisors (see below), whose sum is σ = 27448372800. Its totient is φ = 5378141664.

The previous prime is 12566756773. The next prime is 12566756777. The reversal of 12566756776 is 67765766521.

It is a self number, because there is not a number n which added to its sum of digits gives 12566756776.

It is not an unprimeable number, because it can be changed into a prime (12566756773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259555 + ... + 304141.

It is an arithmetic number, because the mean of its divisors is an integer number (571841100).

Almost surely, 2^12566756776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12566756776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13724186400).

12566756776 is an abundant number, since it is smaller than the sum of its proper divisors (14881616024).

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

12566756776 is a wasteful number, since it uses less digits than its factorization.

12566756776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45326 (or 45315 counting only the distinct ones).

The product of its digits is 22226400, while the sum is 58.

The spelling of 12566756776 in words is "twelve billion, five hundred sixty-six million, seven hundred fifty-six thousand, seven hundred seventy-six".