180054809 has 4 divisors (see below), whose sum is σ = 196423440. Its totient is φ = 163686180.

The previous prime is 180054761. The next prime is 180054817. The reversal of 180054809 is 908450081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180054809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (180054829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8184299 + ... + 8184320.

It is an arithmetic number, because the mean of its divisors is an integer number (49105860).

Almost surely, 2^180054809 is an apocalyptic number.

It is an amenable number.

180054809 is a deficient number, since it is larger than the sum of its proper divisors (16368631).

180054809 is a wasteful number, since it uses less digits than its factorization.

180054809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16368630.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 180054809 is about 13418.4503203611. The cubic root of 180054809 is about 564.6789195615.

The spelling of 180054809 in words is "one hundred eighty million, fifty-four thousand, eight hundred nine".