180081992 has 8 divisors (see below), whose sum is σ = 337653750. Its totient is φ = 90040992.

The previous prime is 180081991. The next prime is 180082009. The reversal of 180081992 is 299180081.

It can be written as a sum of positive squares in only one way, i.e., 159415876 + 20666116 = 12626^2 + 4546^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (180081991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11255117 + ... + 11255132.

Almost surely, 2^180081992 is an apocalyptic number.

It is an amenable number.

180081992 is a deficient number, since it is larger than the sum of its proper divisors (157571758).

180081992 is a wasteful number, since it uses less digits than its factorization.

180081992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22510255 (or 22510251 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 180081992 is about 13419.4631785329. The cubic root of 180081992 is about 564.7073347883.

The spelling of 180081992 in words is "one hundred eighty million, eighty-one thousand, nine hundred ninety-two".