12981309250 has 128 divisors (see below), whose sum is σ = 31210583040. Its totient is φ = 3929587200.

The previous prime is 12981309203. The next prime is 12981309251. The reversal of 12981309250 is 5290318921.

12981309250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12981309251) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 510846 + ... + 535654.

It is an arithmetic number, because the mean of its divisors is an integer number (243832680).

Almost surely, 2^12981309250 is an apocalyptic number.

12981309250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12981309250 is an abundant number, since it is smaller than the sum of its proper divisors (18229273790).

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

12981309250 is a wasteful number, since it uses less digits than its factorization.

12981309250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24869 (or 24859 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 12981309250 in words is "twelve billion, nine hundred eighty-one million, three hundred nine thousand, two hundred fifty".