2165649004 has 12 divisors (see below), whose sum is σ = 3791269944. Its totient is φ = 1082429024.

The previous prime is 2165648983. The next prime is 2165649007. The reversal of 2165649004 is 4009465612.

It is not an unprimeable number, because it can be changed into a prime (2165649007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86374 + ... + 108589.

It is an arithmetic number, because the mean of its divisors is an integer number (315939162).

Almost surely, 2^2165649004 is an apocalyptic number.

It is an amenable number.

2165649004 is a deficient number, since it is larger than the sum of its proper divisors (1625620940).

2165649004 is a wasteful number, since it uses less digits than its factorization.

2165649004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197744 (or 197742 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 2165649004 is about 46536.5340780768. The cubic root of 2165649004 is about 1293.7867228983.

The spelling of 2165649004 in words is "two billion, one hundred sixty-five million, six hundred forty-nine thousand, four".