180081308172 has 24 divisors (see below), whose sum is σ = 442304968000. Its totient is φ = 56867781456.

The previous prime is 180081308119. The next prime is 180081308177. The reversal of 180081308172 is 271803180081.

It is a self number, because there is not a number n which added to its sum of digits gives 180081308172.

It is not an unprimeable number, because it can be changed into a prime (180081308177) 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, 394914922 + ... + 394915377.

Almost surely, 2^180081308172 is an apocalyptic number.

180081308172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

180081308172 is an abundant number, since it is smaller than the sum of its proper divisors (262223659828).

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

180081308172 is a wasteful number, since it uses less digits than its factorization.

180081308172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789830325 (or 789830323 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 39.

The spelling of 180081308172 in words is "one hundred eighty billion, eighty-one million, three hundred eight thousand, one hundred seventy-two".