2165644011 has 8 divisors (see below), whose sum is σ = 2887931200. Its totient is φ = 1443559752.

The previous prime is 2165644007. The next prime is 2165644037. The reversal of 2165644011 is 1104465612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2165644011 - 2² = 2165644007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2165644011.

It is not an unprimeable number, because it can be changed into a prime (2165644081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23785 + ... + 69978.

It is an arithmetic number, because the mean of its divisors is an integer number (360991400).

Almost surely, 2^2165644011 is an apocalyptic number.

2165644011 is a deficient number, since it is larger than the sum of its proper divisors (722287189).

2165644011 is an equidigital number, since it uses as much as digits as its factorization.

2165644011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101465.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 2165644011 is about 46536.4804320224. The cubic root of 2165644011 is about 1293.7857286033.

The spelling of 2165644011 in words is "two billion, one hundred sixty-five million, six hundred forty-four thousand, eleven".