2104705656 has 48 divisors (see below), whose sum is σ = 5703328800. Its totient is φ = 701188992.

The previous prime is 2104705619. The next prime is 2104705679. The reversal of 2104705656 is 6565074012.

It is a happy number.

2104705656 is a `hidden beast` number, since 21 + 0 + 4 + 70 + 565 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2104705656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147025 + ... + 160703.

It is an arithmetic number, because the mean of its divisors is an integer number (118819350).

Almost surely, 2^2104705656 is an apocalyptic number.

It is an amenable number.

2104705656 is an abundant number, since it is smaller than the sum of its proper divisors (3598623144).

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

2104705656 is a wasteful number, since it uses less digits than its factorization.

2104705656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15828 (or 15821 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 2104705656 is about 45877.0711358081. The cubic root of 2104705656 is about 1281.5349538216.

Adding to 2104705656 its reverse (6565074012), we get a palindrome (8669779668).

The spelling of 2104705656 in words is "two billion, one hundred four million, seven hundred five thousand, six hundred fifty-six".