2055188671885 has 4 divisors (see below), whose sum is σ = 2466226406268. Its totient is φ = 1644150937504.

The previous prime is 2055188671819. The next prime is 2055188671889. The reversal of 2055188671885 is 5881768815502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 959402619081 + 1095786052804 = 979491^2 + 1046798^2 .

It is a cyclic number.

It is not a de Polignac number, because 2055188671885 - 2⁹ = 2055188671373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2055188671889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205518867184 + ... + 205518867193.

It is an arithmetic number, because the mean of its divisors is an integer number (616556601567).

Almost surely, 2^{2055188671885} is an apocalyptic number.

It is an amenable number.

2055188671885 is a deficient number, since it is larger than the sum of its proper divisors (411037734383).

2055188671885 is an equidigital number, since it uses as much as digits as its factorization.

2055188671885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411037734382.

The product of its (nonzero) digits is 43008000, while the sum is 64.

The spelling of 2055188671885 in words is "two trillion, fifty-five billion, one hundred eighty-eight million, six hundred seventy-one thousand, eight hundred eighty-five".