180449556 has 60 divisors (see below), whose sum is σ = 491272992. Its totient is φ = 51548784.

The previous prime is 180449551. The next prime is 180449557. The reversal of 180449556 is 655944081.

180449556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180449551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25681 + ... + 31943.

Almost surely, 2^180449556 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 180449556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245636496).

180449556 is an abundant number, since it is smaller than the sum of its proper divisors (310823436).

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

180449556 is an equidigital number, since it uses as much as digits as its factorization.

180449556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6298 (or 6275 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 180449556 is about 13433.1513800746. The cubic root of 180449556 is about 565.0912803157.

It can be divided in two parts, 1804 and 49556, that added together give a triangular number (51360 = T₃₂₀).

The spelling of 180449556 in words is "one hundred eighty million, four hundred forty-nine thousand, five hundred fifty-six".