2180636009 has 8 divisors (see below), whose sum is σ = 2221732800. Its totient is φ = 2139892336.

The previous prime is 2180635999. The next prime is 2180636083. The reversal of 2180636009 is 9006360812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2180636009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2180636009.

It is not an unprimeable number, because it can be changed into a prime (2180636089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75797 + ... + 100530.

It is an arithmetic number, because the mean of its divisors is an integer number (277716600).

Almost surely, 2^2180636009 is an apocalyptic number.

It is an amenable number.

2180636009 is a deficient number, since it is larger than the sum of its proper divisors (41096791).

2180636009 is a wasteful number, since it uses less digits than its factorization.

2180636009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176559.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2180636009 is about 46697.2805310973. The cubic root of 2180636009 is about 1296.7643415943.

The spelling of 2180636009 in words is "two billion, one hundred eighty million, six hundred thirty-six thousand, nine".