561345004 has 24 divisors (see below), whose sum is σ = 1073048256. Its totient is φ = 254826000.

The previous prime is 561344977. The next prime is 561345011. The reversal of 561345004 is 400543165.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27819 + ... + 43549.

It is an arithmetic number, because the mean of its divisors is an integer number (44710344).

Almost surely, 2^561345004 is an apocalyptic number.

It is an amenable number.

561345004 is a deficient number, since it is larger than the sum of its proper divisors (511703252).

561345004 is a wasteful number, since it uses less digits than its factorization.

561345004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16557 (or 16555 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 561345004 is about 23692.7204854149. The cubic root of 561345004 is about 824.9164305923.

Adding to 561345004 its reverse (400543165), we get a palindrome (961888169).

The spelling of 561345004 in words is "five hundred sixty-one million, three hundred forty-five thousand, four".