2163568656 has 40 divisors (see below), whose sum is σ = 5592635104. Its totient is φ = 720748800.

The previous prime is 2163568579. The next prime is 2163568657. The reversal of 2163568656 is 6568653612.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (2163568657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70956 + ... + 96756.

Almost surely, 2^2163568656 is an apocalyptic number.

It is an amenable number.

2163568656 is an abundant number, since it is smaller than the sum of its proper divisors (3429066448).

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

2163568656 is a wasteful number, since it uses less digits than its factorization.

2163568656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27559 (or 27553 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

The square root of 2163568656 is about 46514.1769356397. The cubic root of 2163568656 is about 1293.3723145748.

The spelling of 2163568656 in words is "two billion, one hundred sixty-three million, five hundred sixty-eight thousand, six hundred fifty-six".