561659124 has 192 divisors, whose sum is σ = 1583366400. Its totient is φ = 153280512.

The previous prime is 561659113. The next prime is 561659177. The reversal of 561659124 is 421956165.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (64800) is a multiple of the sum of its prime divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5152782 + ... + 5152890.

It is an arithmetic number, because the mean of its divisors is an integer number (8246700).

Almost surely, 2^561659124 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 561659124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791683200).

561659124 is an abundant number, since it is smaller than the sum of its proper divisors (1021707276).

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

561659124 is a wasteful number, since it uses less digits than its factorization.

561659124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 240 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 561659124 is about 23699.3485986430. The cubic root of 561659124 is about 825.0702720674.

The spelling of 561659124 in words is "five hundred sixty-one million, six hundred fifty-nine thousand, one hundred twenty-four".