2145205168 has 20 divisors (see below), whose sum is σ = 4299657840. Its totient is φ = 1035616064.

The previous prime is 2145205151. The next prime is 2145205169. The reversal of 2145205168 is 8615025412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2145205169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2311180 + ... + 2312107.

It is an arithmetic number, because the mean of its divisors is an integer number (214982892).

Almost surely, 2^2145205168 is an apocalyptic number.

It is an amenable number.

2145205168 is an abundant number, since it is smaller than the sum of its proper divisors (2154452672).

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

2145205168 is a wasteful number, since it uses less digits than its factorization.

2145205168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623324 (or 4623318 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 2145205168 is about 46316.3596151511. The cubic root of 2145205168 is about 1289.7027073662.

The spelling of 2145205168 in words is "two billion, one hundred forty-five million, two hundred five thousand, one hundred sixty-eight".