2165794975 has 24 divisors (see below), whose sum is σ = 2779040880. Its totient is φ = 1673253120.

The previous prime is 2165794957. The next prime is 2165794987. The reversal of 2165794975 is 5794975612.

It is a happy number.

It is not a de Polignac number, because 2165794975 - 2⁷ = 2165794847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84357 + ... + 106993.

It is an arithmetic number, because the mean of its divisors is an integer number (115793370).

Almost surely, 2^2165794975 is an apocalyptic number.

2165794975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2165794975 is a deficient number, since it is larger than the sum of its proper divisors (613245905).

2165794975 is a wasteful number, since it uses less digits than its factorization.

2165794975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22779 (or 22774 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 55.

The square root of 2165794975 is about 46538.1024000764. The cubic root of 2165794975 is about 1293.8157905663.

The spelling of 2165794975 in words is "two billion, one hundred sixty-five million, seven hundred ninety-four thousand, nine hundred seventy-five".