2180861516 has 6 divisors (see below), whose sum is σ = 3816507660. Its totient is φ = 1090430756.

The previous prime is 2180861491. The next prime is 2180861519. The reversal of 2180861516 is 6151680812.

2180861516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2180861516.

It is not an unprimeable number, because it can be changed into a prime (2180861519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272607686 + ... + 272607693.

It is an arithmetic number, because the mean of its divisors is an integer number (636084610).

Almost surely, 2^2180861516 is an apocalyptic number.

It is an amenable number.

2180861516 is a deficient number, since it is larger than the sum of its proper divisors (1635646144).

2180861516 is a wasteful number, since it uses less digits than its factorization.

2180861516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545215383 (or 545215381 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 2180861516 is about 46699.6950311241. The cubic root of 2180861516 is about 1296.8090409932.

The spelling of 2180861516 in words is "two billion, one hundred eighty million, eight hundred sixty-one thousand, five hundred sixteen".