12688444776 has 128 divisors (see below), whose sum is σ = 38347960320. Its totient is φ = 3420071424.

The previous prime is 12688444763. The next prime is 12688444837. The reversal of 12688444776 is 67744488621.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259581 + ... + 304563.

It is an arithmetic number, because the mean of its divisors is an integer number (299593440).

Almost surely, 2^12688444776 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 12688444776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19173980160).

12688444776 is an abundant number, since it is smaller than the sum of its proper divisors (25659515544).

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

12688444776 is a wasteful number, since it uses less digits than its factorization.

12688444776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45095 (or 45091 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 57.

The spelling of 12688444776 in words is "twelve billion, six hundred eighty-eight million, four hundred forty-four thousand, seven hundred seventy-six".