561023526 has 64 divisors (see below), whose sum is σ = 1386385920. Its totient is φ = 147744000.

The previous prime is 561023479. The next prime is 561023549. The reversal of 561023526 is 625320165.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 561023493 and 561023502.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 20026 + ... + 39026.

It is an arithmetic number, because the mean of its divisors is an integer number (21662280).

Almost surely, 2^561023526 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561023526, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693192960).

561023526 is an abundant number, since it is smaller than the sum of its proper divisors (825362394).

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

561023526 is a wasteful number, since it uses less digits than its factorization.

561023526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19069.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 561023526 is about 23685.9351936967. The cubic root of 561023526 is about 824.7589260730.

The spelling of 561023526 in words is "five hundred sixty-one million, twenty-three thousand, five hundred twenty-six".