561647424 has 112 divisors (see below), whose sum is σ = 1637865152. Its totient is φ = 168763392.

The previous prime is 561647423. The next prime is 561647447. The reversal of 561647424 is 424746165.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561647423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104712 + ... + 109944.

It is an arithmetic number, because the mean of its divisors is an integer number (14623796).

Almost surely, 2^561647424 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 561647424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818932576).

561647424 is an abundant number, since it is smaller than the sum of its proper divisors (1076217728).

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

561647424 is a wasteful number, since it uses less digits than its factorization.

561647424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304 (or 5294 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 561647424 is about 23699.1017551299. The cubic root of 561647424 is about 825.0645429761.

The spelling of 561647424 in words is "five hundred sixty-one million, six hundred forty-seven thousand, four hundred twenty-four".