12856880780 has 12 divisors (see below), whose sum is σ = 26999449680. Its totient is φ = 5142752304.

The previous prime is 12856880779. The next prime is 12856880789. The reversal of 12856880780 is 8708865821.

It is a super-2 number, since 2×12856880780² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12856880789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321422000 + ... + 321422039.

It is an arithmetic number, because the mean of its divisors is an integer number (2249954140).

Almost surely, 2^12856880780 is an apocalyptic number.

12856880780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12856880780 is an abundant number, since it is smaller than the sum of its proper divisors (14142568900).

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

12856880780 is a wasteful number, since it uses less digits than its factorization.

12856880780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642844048 (or 642844046 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 53.

The spelling of 12856880780 in words is "twelve billion, eight hundred fifty-six million, eight hundred eighty thousand, seven hundred eighty".