12991310180 has 24 divisors (see below), whose sum is σ = 27796503672. Its totient is φ = 5098476032.

The previous prime is 12991310161. The next prime is 12991310183. The reversal of 12991310180 is 8101319921.

It can be written as a sum of positive squares in 4 ways, for example, as 1864857856 + 11126452324 = 43184^2 + 105482^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12991310180.

It is not an unprimeable number, because it can be changed into a prime (12991310183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6126917 + ... + 6129036.

It is an arithmetic number, because the mean of its divisors is an integer number (1158187653).

Almost surely, 2^12991310180 is an apocalyptic number.

12991310180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12991310180 is an abundant number, since it is smaller than the sum of its proper divisors (14805193492).

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

12991310180 is a wasteful number, since it uses less digits than its factorization.

12991310180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12256015 (or 12256013 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 12991310180 in words is "twelve billion, nine hundred ninety-one million, three hundred ten thousand, one hundred eighty".