561634004 has 12 divisors (see below), whose sum is σ = 1001404404. Its totient is φ = 275518464.

The previous prime is 561634001. The next prime is 561634013. The reversal of 561634004 is 400436165.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 448168900 + 113465104 = 21170^2 + 10652^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561634001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324397 + ... + 1324820.

It is an arithmetic number, because the mean of its divisors is an integer number (83450367).

Almost surely, 2^561634004 is an apocalyptic number.

It is an amenable number.

561634004 is a deficient number, since it is larger than the sum of its proper divisors (439770400).

561634004 is a wasteful number, since it uses less digits than its factorization.

561634004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649274 (or 2649272 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 561634004 is about 23698.8186203448. The cubic root of 561634004 is about 825.0579715615.

The spelling of 561634004 in words is "five hundred sixty-one million, six hundred thirty-four thousand, four".