180998581122 has 54 divisors (see below), whose sum is σ = 395400745467. Its totient is φ = 59838895872.

The previous prime is 180998581081. The next prime is 180998581123. The reversal of 180998581122 is 221185899081.

It can be written as a sum of positive squares in 5 ways, for example, as 5361314841 + 175637266281 = 73221^2 + 419091^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=300831.

It is not an unprimeable number, because it can be changed into a prime (180998581123) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 268942578 + ... + 268943250.

Almost surely, 2^180998581122 is an apocalyptic number.

180998581122 is an abundant number, since it is smaller than the sum of its proper divisors (214402164345).

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

180998581122 is an frugal number, since it uses more digits than its factorization.

180998581122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 54.

The spelling of 180998581122 in words is "one hundred eighty billion, nine hundred ninety-eight million, five hundred eighty-one thousand, one hundred twenty-two".