2165970885 has 32 divisors (see below), whose sum is σ = 3734736768. Its totient is φ = 1065580800.

The previous prime is 2165970869. The next prime is 2165970893. The reversal of 2165970885 is 5880795612.

It is not a de Polignac number, because 2165970885 - 2⁴ = 2165970869 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367774 + ... + 373616.

It is an arithmetic number, because the mean of its divisors is an integer number (116710524).

Almost surely, 2^2165970885 is an apocalyptic number.

It is an amenable number.

2165970885 is a deficient number, since it is larger than the sum of its proper divisors (1568765883).

2165970885 is a wasteful number, since it uses less digits than its factorization.

2165970885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7765.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The square root of 2165970885 is about 46539.9923184351. The cubic root of 2165970885 is about 1293.8508183469.

The spelling of 2165970885 in words is "two billion, one hundred sixty-five million, nine hundred seventy thousand, eight hundred eighty-five".