2165628318 has 32 divisors (see below), whose sum is σ = 5109688320. Its totient is φ = 598790880.

The previous prime is 2165628301. The next prime is 2165628371. The reversal of 2165628318 is 8138265612.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 2165628318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830353 + ... + 832956.

It is an arithmetic number, because the mean of its divisors is an integer number (159677760).

Almost surely, 2^2165628318 is an apocalyptic number.

2165628318 is an abundant number, since it is smaller than the sum of its proper divisors (2944060002).

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

2165628318 is a wasteful number, since it uses less digits than its factorization.

2165628318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663352.

The product of its digits is 138240, while the sum is 42.

The square root of 2165628318 is about 46536.3118220600. The cubic root of 2165628318 is about 1293.7826035239.

The spelling of 2165628318 in words is "two billion, one hundred sixty-five million, six hundred twenty-eight thousand, three hundred eighteen".