180489465 has 84 divisors (see below), whose sum is σ = 352833516. Its totient is φ = 88553088.

The previous prime is 180489451. The next prime is 180489481. The reversal of 180489465 is 564984081.

180489465 is a `hidden beast` number, since 180 + 4 + 8 + 9 + 465 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 6170256 + 174319209 = 2484^2 + 13203^2 .

It is not a de Polignac number, because 180489465 - 2⁶ = 180489401 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 180489465.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 615859 + ... + 616151.

It is an arithmetic number, because the mean of its divisors is an integer number (4200399).

Almost surely, 2^180489465 is an apocalyptic number.

180489465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

180489465 is a deficient number, since it is larger than the sum of its proper divisors (172344051).

180489465 is an equidigital number, since it uses as much as digits as its factorization.

180489465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 180489465 is about 13434.6367647213. The cubic root of 180489465 is about 565.1329365843.

The spelling of 180489465 in words is "one hundred eighty million, four hundred eighty-nine thousand, four hundred sixty-five".