12776079920 has 80 divisors (see below), whose sum is σ = 31187691360. Its totient is φ = 4860506112.

The previous prime is 12776079917. The next prime is 12776079931. The reversal of 12776079920 is 2997067721.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114344 + ... + 196536.

It is an arithmetic number, because the mean of its divisors is an integer number (389846142).

Almost surely, 2^12776079920 is an apocalyptic number.

12776079920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12776079920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15593845680).

12776079920 is an abundant number, since it is smaller than the sum of its proper divisors (18411611440).

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

12776079920 is a wasteful number, since it uses less digits than its factorization.

12776079920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82302 (or 82296 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 50.

The spelling of 12776079920 in words is "twelve billion, seven hundred seventy-six million, seventy-nine thousand, nine hundred twenty".