2165755008 has 128 divisors (see below), whose sum is σ = 5910696000. Its totient is φ = 702369792.

The previous prime is 2165754973. The next prime is 2165755037. The reversal of 2165755008 is 8005575612.

It is a tau number, because it is divible by the number of its divisors (128).

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, 2469066 + ... + 2469942.

Almost surely, 2^2165755008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2165755008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2955348000).

2165755008 is an abundant number, since it is smaller than the sum of its proper divisors (3744940992).

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

2165755008 is a wasteful number, since it uses less digits than its factorization.

2165755008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 2165755008 is about 46537.6729972610. The cubic root of 2165755008 is about 1293.8078319407.

The spelling of 2165755008 in words is "two billion, one hundred sixty-five million, seven hundred fifty-five thousand, eight".