56645568 has 210 divisors, whose sum is σ = 196205856. Its totient is φ = 16111872.

The previous prime is 56645543. The next prime is 56645599. The reversal of 56645568 is 86554665.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 29 ways as a sum of consecutive naturals, for example, 253905 + ... + 254127.

Almost surely, 2^56645568 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 56645568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98102928).

56645568 is an abundant number, since it is smaller than the sum of its proper divisors (139560288).

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

56645568 is a wasteful number, since it uses less digits than its factorization.

56645568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 235 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 56645568 is about 7526.3249996263. The cubic root of 56645568 is about 384.0507745360.

The spelling of 56645568 in words is "fifty-six million, six hundred forty-five thousand, five hundred sixty-eight".