2165356008 has 24 divisors (see below), whose sum is σ = 5864506050. Its totient is φ = 721785312.

The previous prime is 2165356007. The next prime is 2165356051. The reversal of 2165356008 is 8006535612.

2165356008 is a `hidden beast` number, since 2 + 16 + 5 + 35 + 600 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1904275044 + 261080964 = 43638^2 + 16158^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2165356007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15037123 + ... + 15037266.

Almost surely, 2^2165356008 is an apocalyptic number.

It is an amenable number.

2165356008 is an abundant number, since it is smaller than the sum of its proper divisors (3699150042).

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

2165356008 is a wasteful number, since it uses less digits than its factorization.

2165356008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30074401 (or 30074394 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 2165356008 is about 46533.3859503045. The cubic root of 2165356008 is about 1293.7283737336.

The spelling of 2165356008 in words is "two billion, one hundred sixty-five million, three hundred fifty-six thousand, eight".