564621616 has 40 divisors (see below), whose sum is σ = 1185972704. Its totient is φ = 258854400.

The previous prime is 564621601. The next prime is 564621647. The reversal of 564621616 is 616126465.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22420 + ... + 40396.

Almost surely, 2^564621616 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 564621616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592986352).

564621616 is an abundant number, since it is smaller than the sum of its proper divisors (621351088).

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

564621616 is a wasteful number, since it uses less digits than its factorization.

564621616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18149 (or 18143 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 564621616 is about 23761.7679476928. The cubic root of 564621616 is about 826.5183503714.

The spelling of 564621616 in words is "five hundred sixty-four million, six hundred twenty-one thousand, six hundred sixteen".