2165048906 has 32 divisors (see below), whose sum is σ = 3479248080. Its totient is φ = 1006857216.

The previous prime is 2165048881. The next prime is 2165048909. The reversal of 2165048906 is 6098405612.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2057076025 + 107972881 = 45355^2 + 10391^2 .

It is not an unprimeable number, because it can be changed into a prime (2165048909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2716100 + ... + 2716896.

Almost surely, 2^2165048906 is an apocalyptic number.

2165048906 is a deficient number, since it is larger than the sum of its proper divisors (1314199174).

2165048906 is a wasteful number, since it uses less digits than its factorization.

2165048906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 2165048906 is about 46530.0860304384. The cubic root of 2165048906 is about 1293.6672097566.

The spelling of 2165048906 in words is "two billion, one hundred sixty-five million, forty-eight thousand, nine hundred six".