2165057616 has 20 divisors (see below), whose sum is σ = 5593065632. Its totient is φ = 721685856.

The previous prime is 2165057591. The next prime is 2165057623. The reversal of 2165057616 is 6167505612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22552636 + ... + 22552731.

Almost surely, 2^2165057616 is an apocalyptic number.

It is an amenable number.

2165057616 is an abundant number, since it is smaller than the sum of its proper divisors (3428008016).

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

2165057616 is a wasteful number, since it uses less digits than its factorization.

2165057616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45105378 (or 45105372 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 2165057616 is about 46530.1796257010. The cubic root of 2165057616 is about 1293.6689445636.

The spelling of 2165057616 in words is "two billion, one hundred sixty-five million, fifty-seven thousand, six hundred sixteen".