2180701855 has 4 divisors (see below), whose sum is σ = 2616842232. Its totient is φ = 1744561480.

The previous prime is 2180701847. The next prime is 2180701927. The reversal of 2180701855 is 5581070812.

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

It is not a de Polignac number, because 2180701855 - 2³ = 2180701847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218070181 + ... + 218070190.

It is an arithmetic number, because the mean of its divisors is an integer number (654210558).

Almost surely, 2^2180701855 is an apocalyptic number.

2180701855 is a deficient number, since it is larger than the sum of its proper divisors (436140377).

2180701855 is an equidigital number, since it uses as much as digits as its factorization.

2180701855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436140376.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 2180701855 is about 46697.9855561244. The cubic root of 2180701855 is about 1296.7773937321. Note that the first 3 decimals are identical.

The spelling of 2180701855 in words is "two billion, one hundred eighty million, seven hundred one thousand, eight hundred fifty-five".