2128985855 has 8 divisors (see below), whose sum is σ = 2573163600. Its totient is φ = 1690934976.

The previous prime is 2128985849. The next prime is 2128985863. The reversal of 2128985855 is 5585898212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2128985855 - 2¹⁸ = 2128723711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2128985797 and 2128985806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530950 + ... + 1532339.

It is an arithmetic number, because the mean of its divisors is an integer number (321645450).

Almost surely, 2^2128985855 is an apocalyptic number.

2128985855 is a deficient number, since it is larger than the sum of its proper divisors (444177745).

2128985855 is a wasteful number, since it uses less digits than its factorization.

2128985855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063433.

The product of its digits is 2304000, while the sum is 53.

The square root of 2128985855 is about 46140.9347001120. The cubic root of 2128985855 is about 1286.4441172430. Note that the first 3 decimals are identical.

The spelling of 2128985855 in words is "two billion, one hundred twenty-eight million, nine hundred eighty-five thousand, eight hundred fifty-five".