180556880 has 80 divisors (see below), whose sum is σ = 481469184. Its totient is φ = 61685760.

The previous prime is 180556861. The next prime is 180556897. The reversal of 180556880 is 88655081.

180556880 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

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, 281360 + ... + 282000.

Almost surely, 2^180556880 is an apocalyptic number.

180556880 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 180556880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240734592).

180556880 is an abundant number, since it is smaller than the sum of its proper divisors (300912304).

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

180556880 is a wasteful number, since it uses less digits than its factorization.

180556880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 180556880 is about 13437.1455302084. The cubic root of 180556880 is about 565.2032891568.

It can be divided in two parts, 1805 and 56880, that added together give a palindrome (58685).

The spelling of 180556880 in words is "one hundred eighty million, five hundred fifty-six thousand, eight hundred eighty".