180504145 has 4 divisors (see below), whose sum is σ = 216604980. Its totient is φ = 144403312.

The previous prime is 180504143. The next prime is 180504173. The reversal of 180504145 is 541405081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139428864 + 41075281 = 11808^2 + 6409^2 .

It is a cyclic number.

It is not a de Polignac number, because 180504145 - 2¹ = 180504143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180504143) 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 3 ways as a sum of consecutive naturals, for example, 18050410 + ... + 18050419.

It is an arithmetic number, because the mean of its divisors is an integer number (54151245).

Almost surely, 2^180504145 is an apocalyptic number.

It is an amenable number.

180504145 is a deficient number, since it is larger than the sum of its proper divisors (36100835).

180504145 is an equidigital number, since it uses as much as digits as its factorization.

180504145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36100834.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 180504145 is about 13435.1831025855. The cubic root of 180504145 is about 565.1482577493.

The spelling of 180504145 in words is "one hundred eighty million, five hundred four thousand, one hundred forty-five".