563641664 has 56 divisors (see below), whose sum is σ = 1193109120. Its totient is φ = 263264256.

The previous prime is 563641649. The next prime is 563641693. The reversal of 563641664 is 466146365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149369 + ... + 153095.

It is an arithmetic number, because the mean of its divisors is an integer number (21305520).

Almost surely, 2^563641664 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 563641664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (596554560).

563641664 is an abundant number, since it is smaller than the sum of its proper divisors (629467456).

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

563641664 is a wasteful number, since it uses less digits than its factorization.

563641664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895 (or 3885 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 563641664 is about 23741.1386416069. The cubic root of 563641664 is about 826.0399076295.

The spelling of 563641664 in words is "five hundred sixty-three million, six hundred forty-one thousand, six hundred sixty-four".