180801899 has 4 divisors (see below), whose sum is σ = 182225664. Its totient is φ = 179378136.

The previous prime is 180801847. The next prime is 180801911. The reversal of 180801899 is 998108081.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180801899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180801839) 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, 711692 + ... + 711945.

It is an arithmetic number, because the mean of its divisors is an integer number (45556416).

Almost surely, 2^180801899 is an apocalyptic number.

180801899 is a deficient number, since it is larger than the sum of its proper divisors (1423765).

180801899 is a wasteful number, since it uses less digits than its factorization.

180801899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423764.

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 180801899 is about 13446.2596657955. The cubic root of 180801899 is about 565.4588373427.

The spelling of 180801899 in words is "one hundred eighty million, eight hundred one thousand, eight hundred ninety-nine".