2017808964 has 36 divisors (see below), whose sum is σ = 5102255340. Its totient is φ = 672381120.

The previous prime is 2017808963. The next prime is 2017808977. The reversal of 2017808964 is 4698087102.

It can be written as a sum of positive squares in 2 ways, for example, as 1584836100 + 432972864 = 39810^2 + 20808^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2017808963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130222 + ... + 144890.

It is an arithmetic number, because the mean of its divisors is an integer number (141729315).

Almost surely, 2^2017808964 is an apocalyptic number.

It is an amenable number.

2017808964 is an abundant number, since it is smaller than the sum of its proper divisors (3084446376).

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

2017808964 is a wasteful number, since it uses less digits than its factorization.

2017808964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18500 (or 18495 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 2017808964 is about 44920.0285396169. The cubic root of 2017808964 is about 1263.6496527084.

The spelling of 2017808964 in words is "two billion, seventeen million, eight hundred eight thousand, nine hundred sixty-four".