2180944764 has 30 divisors (see below), whose sum is σ = 5701421264. Its totient is φ = 726981480.

The previous prime is 2180944699. The next prime is 2180944781. The reversal of 2180944764 is 4674490812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3365332 + ... + 3365979.

Almost surely, 2^2180944764 is an apocalyptic number.

It is an amenable number.

2180944764 is an abundant number, since it is smaller than the sum of its proper divisors (3520476500).

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

2180944764 is a wasteful number, since it uses less digits than its factorization.

2180944764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6731327 (or 6731316 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 2180944764 is about 46700.5863346489. The cubic root of 2180944764 is about 1296.8255414120.

The spelling of 2180944764 in words is "two billion, one hundred eighty million, nine hundred forty-four thousand, seven hundred sixty-four".