181432818080 has 96 divisors (see below), whose sum is σ = 435336930000. Its totient is φ = 71447068672.

The previous prime is 181432818067. The next prime is 181432818097. The reversal of 181432818080 is 80818234181.

It can be written as a sum of positive squares in 8 ways, for example, as 8200389136 + 173232428944 = 90556^2 + 416212^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2660246 + ... + 2727594.

Almost surely, 2^181432818080 is an apocalyptic number.

181432818080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181432818080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217668465000).

181432818080 is an abundant number, since it is smaller than the sum of its proper divisors (253904111920).

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

181432818080 is a wasteful number, since it uses less digits than its factorization.

181432818080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67626 (or 67618 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 44.

The spelling of 181432818080 in words is "one hundred eighty-one billion, four hundred thirty-two million, eight hundred eighteen thousand, eighty".