557626656 has 144 divisors (see below), whose sum is σ = 1578225600. Its totient is φ = 172339200.

The previous prime is 557626627. The next prime is 557626721. The reversal of 557626656 is 656626755.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2802045 + ... + 2802243.

It is an arithmetic number, because the mean of its divisors is an integer number (10959900).

Almost surely, 2^557626656 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 557626656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789112800).

557626656 is an abundant number, since it is smaller than the sum of its proper divisors (1020598944).

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

557626656 is a wasteful number, since it uses less digits than its factorization.

557626656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 322 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 48.

The square root of 557626656 is about 23614.1198438561. The cubic root of 557626656 is about 823.0909792055.

Subtracting 557626656 from its reverse (656626755), we obtain a palindrome (99000099).

The spelling of 557626656 in words is "five hundred fifty-seven million, six hundred twenty-six thousand, six hundred fifty-six".