180027944209 has 9 divisors (see below), whose sum is σ = 186036223401. Its totient is φ = 174207862260.

The previous prime is 180027944179. The next prime is 180027944219. The reversal of 180027944209 is 902449720081.

The square root of 180027944209 is 424297.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 180027944209 - 2⁷ = 180027944081 is a prime.

It is a super-2 number, since 2×180027944209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180027944219) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13146364 + ... + 13160050.

It is an arithmetic number, because the mean of its divisors is an integer number (20670691489).

Almost surely, 2^180027944209 is an apocalyptic number.

180027944209 is the 424297-th square number.

180027944209 is the 212149-th centered octagonal number.

It is an amenable number.

180027944209 is a deficient number, since it is larger than the sum of its proper divisors (6008279192).

180027944209 is an frugal number, since it uses more digits than its factorization.

180027944209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27436 (or 13718 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 180027944209 in words is "one hundred eighty billion, twenty-seven million, nine hundred forty-four thousand, two hundred nine".