81060180 has 48 divisors (see below), whose sum is σ = 228723264. Its totient is φ = 21448960.

The previous prime is 81060179. The next prime is 81060197. The reversal of 81060180 is 8106018.

It is a self number, because there is not a number n which added to its sum of digits gives 81060180.

It is a congruent number.

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, 2704 + ... + 13016.

It is an arithmetic number, because the mean of its divisors is an integer number (4765068).

Almost surely, 2^81060180 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 81060180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114361632).

81060180 is an abundant number, since it is smaller than the sum of its proper divisors (147663084).

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

81060180 is a wasteful number, since it uses less digits than its factorization.

81060180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10456 (or 10454 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 81060180 is about 9003.3427125707. The cubic root of 81060180 is about 432.7819983675.

Adding to 81060180 its reverse (8106018), we get a palindrome (89166198).

The spelling of 81060180 in words is "eighty-one million, sixty thousand, one hundred eighty".