5656889680 has 120 divisors (see below), whose sum is σ = 14302086840. Its totient is φ = 2079866880.

The previous prime is 5656889657. The next prime is 5656889681. The reversal of 5656889680 is 869886565.

It can be written as a sum of positive squares in 12 ways, for example, as 3562179856 + 2094709824 = 59684^2 + 45768^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5656889681) 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 23 ways as a sum of consecutive naturals, for example, 3798376 + ... + 3799864.

It is an arithmetic number, because the mean of its divisors is an integer number (119184057).

Almost surely, 2^5656889680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5656889680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7151043420).

5656889680 is an abundant number, since it is smaller than the sum of its proper divisors (8645197160).

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

5656889680 is a wasteful number, since it uses less digits than its factorization.

5656889680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809 (or 1790 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 61.

The square root of 5656889680 is about 75212.2973987632. The cubic root of 5656889680 is about 1781.8011562431.

The spelling of 5656889680 in words is "five billion, six hundred fifty-six million, eight hundred eighty-nine thousand, six hundred eighty".