2180517668 has 24 divisors (see below), whose sum is σ = 4550646912. Its totient is φ = 893876544.

The previous prime is 2180517643. The next prime is 2180517701. The reversal of 2180517668 is 8667150812.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 1692305 + ... + 1693592.

It is an arithmetic number, because the mean of its divisors is an integer number (189610288).

Almost surely, 2^2180517668 is an apocalyptic number.

2180517668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2180517668 is an abundant number, since it is smaller than the sum of its proper divisors (2370129244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2180517668 is a wasteful number, since it uses less digits than its factorization.

2180517668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385931 (or 3385929 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 2180517668 is about 46696.0134058572. The cubic root of 2180517668 is about 1296.7408831225.

The spelling of 2180517668 in words is "two billion, one hundred eighty million, five hundred seventeen thousand, six hundred sixty-eight".