561804474 has 128 divisors (see below), whose sum is σ = 1494484992. Its totient is φ = 136304640.

The previous prime is 561804461. The next prime is 561804479. The reversal of 561804474 is 474408165.

It is not an unprimeable number, because it can be changed into a prime (561804479) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1829829 + ... + 1830135.

It is an arithmetic number, because the mean of its divisors is an integer number (11675664).

Almost surely, 2^561804474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561804474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747242496).

561804474 is an abundant number, since it is smaller than the sum of its proper divisors (932680518).

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

561804474 is a wasteful number, since it uses less digits than its factorization.

561804474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 561804474 is about 23702.4149402545. The cubic root of 561804474 is about 825.1414383766.

The spelling of 561804474 in words is "five hundred sixty-one million, eight hundred four thousand, four hundred seventy-four".