2165953090 has 32 divisors (see below), whose sum is σ = 4467363840. Its totient is φ = 740664384.

The previous prime is 2165953063. The next prime is 2165953099. The reversal of 2165953090 is 903595612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2165953099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13585 + ... + 67204.

It is an arithmetic number, because the mean of its divisors is an integer number (139605120).

Almost surely, 2^2165953090 is an apocalyptic number.

2165953090 is an abundant number, since it is smaller than the sum of its proper divisors (2301410750).

2165953090 is a wasteful number, since it uses less digits than its factorization.

2165953090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81186.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 2165953090 is about 46539.8011383805. The cubic root of 2165953090 is about 1293.8472750339.

The spelling of 2165953090 in words is "two billion, one hundred sixty-five million, nine hundred fifty-three thousand, ninety".