12765424780 has 72 divisors (see below), whose sum is σ = 28539579600. Its totient is φ = 4795259904.

The previous prime is 12765424753. The next prime is 12765424811. The reversal of 12765424780 is 8742456721.

12765424780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12765424780.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2939851 + ... + 2944189.

It is an arithmetic number, because the mean of its divisors is an integer number (396383050).

Almost surely, 2^12765424780 is an apocalyptic number.

12765424780 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 12765424780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14269789800).

12765424780 is an abundant number, since it is smaller than the sum of its proper divisors (15774154820).

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

12765424780 is a wasteful number, since it uses less digits than its factorization.

12765424780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891 (or 4872 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 46.

The spelling of 12765424780 in words is "twelve billion, seven hundred sixty-five million, four hundred twenty-four thousand, seven hundred eighty".