2099655684 has 81 divisors (see below), whose sum is σ = 6179651751. Its totient is φ = 599351760.

The previous prime is 2099655653. The next prime is 2099655749. The reversal of 2099655684 is 4865569902.

It is a happy number.

The square root of 2099655684 is 45822.

It is a perfect power (a square), and thus also a powerful number.

2099655684 is a `hidden beast` number, since 2 + 0 + 9 + 9 + 6 + 556 + 84 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2099655684.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 1923979 + ... + 1925069.

Almost surely, 2^2099655684 is an apocalyptic number.

2099655684 is the 45822-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2099655684

2099655684 is an abundant number, since it is smaller than the sum of its proper divisors (4079996067).

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

2099655684 is a wasteful number, since it uses less digits than its factorization.

2099655684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The cubic root of 2099655684 is about 1280.5091732421.

The spelling of 2099655684 in words is "two billion, ninety-nine million, six hundred fifty-five thousand, six hundred eighty-four".