180081816 has 64 divisors (see below), whose sum is σ = 486881280. Its totient is φ = 55288320.

The previous prime is 180081779. The next prime is 180081817. The reversal of 180081816 is 618180081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180081817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14481 + ... + 23871.

It is an arithmetic number, because the mean of its divisors is an integer number (7607520).

Almost surely, 2^180081816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180081816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243440640).

180081816 is an abundant number, since it is smaller than the sum of its proper divisors (306799464).

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

180081816 is a wasteful number, since it uses less digits than its factorization.

180081816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9464 (or 9460 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 33.

The square root of 180081816 is about 13419.4566208919. The cubic root of 180081816 is about 564.7071508193.

The spelling of 180081816 in words is "one hundred eighty million, eighty-one thousand, eight hundred sixteen".