180539938728 has 24 divisors (see below), whose sum is σ = 488962334250. Its totient is φ = 60179979552.

The previous prime is 180539938723. The next prime is 180539938751. The reversal of 180539938728 is 827839935081.

180539938728 is a `hidden beast` number, since 1 + 8 + 0 + 539 + 93 + 8 + 7 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 175961792484 + 4578146244 = 419478^2 + 67662^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (180539938723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1253749503 + ... + 1253749646.

Almost surely, 2^180539938728 is an apocalyptic number.

180539938728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

180539938728 is an abundant number, since it is smaller than the sum of its proper divisors (308422395522).

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

180539938728 is a wasteful number, since it uses less digits than its factorization.

180539938728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507499161 (or 2507499154 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 180539938728 in words is "one hundred eighty billion, five hundred thirty-nine million, nine hundred thirty-eight thousand, seven hundred twenty-eight".