561526524 has 144 divisors (see below), whose sum is σ = 1632208032. Its totient is φ = 161243136.

The previous prime is 561526523. The next prime is 561526571. The reversal of 561526524 is 425625165.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561526523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1296612 + ... + 1297044.

It is an arithmetic number, because the mean of its divisors is an integer number (11334778).

Almost surely, 2^561526524 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 561526524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816104016).

561526524 is an abundant number, since it is smaller than the sum of its proper divisors (1070681508).

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

561526524 is a wasteful number, since it uses less digits than its factorization.

561526524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 631 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 561526524 is about 23696.5508882622. The cubic root of 561526524 is about 825.0053377065.

The spelling of 561526524 in words is "five hundred sixty-one million, five hundred twenty-six thousand, five hundred twenty-four".