12081980180 has 12 divisors (see below), whose sum is σ = 25372158420. Its totient is φ = 4832792064.

The previous prime is 12081980173. The next prime is 12081980191. The reversal of 12081980180 is 8108918021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4337276164 + 7744704016 = 65858^2 + 88004^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302049485 + ... + 302049524.

It is an arithmetic number, because the mean of its divisors is an integer number (2114346535).

Almost surely, 2^12081980180 is an apocalyptic number.

12081980180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12081980180 is an abundant number, since it is smaller than the sum of its proper divisors (13290178240).

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

12081980180 is a wasteful number, since it uses less digits than its factorization.

12081980180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604099018 (or 604099016 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 38.

The spelling of 12081980180 in words is "twelve billion, eighty-one million, nine hundred eighty thousand, one hundred eighty".