12779569704 has 128 divisors (see below), whose sum is σ = 36100546560. Its totient is φ = 3734880000.

The previous prime is 12779569703. The next prime is 12779569709. The reversal of 12779569704 is 40796597721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12779569703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2542714 + ... + 2547734.

It is an arithmetic number, because the mean of its divisors is an integer number (282035520).

Almost surely, 2^12779569704 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 12779569704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18050273280).

12779569704 is an abundant number, since it is smaller than the sum of its proper divisors (23320976856).

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

12779569704 is a wasteful number, since it uses less digits than its factorization.

12779569704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5383 (or 5379 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 57.

The spelling of 12779569704 in words is "twelve billion, seven hundred seventy-nine million, five hundred sixty-nine thousand, seven hundred four".