563561520 has 80 divisors (see below), whose sum is σ = 1751887872. Its totient is φ = 149866240.

The previous prime is 563561507. The next prime is 563561563. The reversal of 563561520 is 25165365.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 88855 + ... + 94985.

Almost surely, 2^563561520 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 563561520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875943936).

563561520 is an abundant number, since it is smaller than the sum of its proper divisors (1188326352).

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

563561520 is a wasteful number, since it uses less digits than its factorization.

563561520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530 (or 6524 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 563561520 is about 23739.4507097363. The cubic root of 563561520 is about 826.0007543372. Note that the first 3 decimals are identical.

The spelling of 563561520 in words is "five hundred sixty-three million, five hundred sixty-one thousand, five hundred twenty".