2165117768 has 32 divisors (see below), whose sum is σ = 4531649760. Its totient is φ = 961255680.

The previous prime is 2165117743. The next prime is 2165117771. The reversal of 2165117768 is 8677115612.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 282305 + ... + 289872.

It is an arithmetic number, because the mean of its divisors is an integer number (141614055).

Almost surely, 2^2165117768 is an apocalyptic number.

It is an amenable number.

2165117768 is an abundant number, since it is smaller than the sum of its proper divisors (2366531992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165117768 is a wasteful number, since it uses less digits than its factorization.

2165117768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572237 (or 572233 counting only the distinct ones).

The product of its digits is 141120, while the sum is 44.

The square root of 2165117768 is about 46530.8259973966. The cubic root of 2165117768 is about 1293.6809251614.

The spelling of 2165117768 in words is "two billion, one hundred sixty-five million, one hundred seventeen thousand, seven hundred sixty-eight".