2116985655 has 16 divisors (see below), whose sum is σ = 3387756384. Its totient is φ = 1128865920.

The previous prime is 2116985621. The next prime is 2116985669. The reversal of 2116985655 is 5565896112.

It is not a de Polignac number, because 2116985655 - 2¹¹ = 2116983607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142017 + ... + 156213.

It is an arithmetic number, because the mean of its divisors is an integer number (211734774).

Almost surely, 2^2116985655 is an apocalyptic number.

2116985655 is a deficient number, since it is larger than the sum of its proper divisors (1270770729).

2116985655 is a wasteful number, since it uses less digits than its factorization.

2116985655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24146.

The product of its digits is 648000, while the sum is 48.

The square root of 2116985655 is about 46010.7123939632. The cubic root of 2116985655 is about 1284.0225130950.

The spelling of 2116985655 in words is "two billion, one hundred sixteen million, nine hundred eighty-five thousand, six hundred fifty-five".