561630017 has 4 divisors (see below), whose sum is σ = 604832340. Its totient is φ = 518427696.

The previous prime is 561629983. The next prime is 561630019. The reversal of 561630017 is 710036165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 245110336 + 316519681 = 15656^2 + 17791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561630017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561630019) 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, 21601142 + ... + 21601167.

It is an arithmetic number, because the mean of its divisors is an integer number (151208085).

Almost surely, 2^561630017 is an apocalyptic number.

It is an amenable number.

561630017 is a deficient number, since it is larger than the sum of its proper divisors (43202323).

561630017 is a wasteful number, since it uses less digits than its factorization.

561630017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43202322.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 561630017 is about 23698.7345020784. The cubic root of 561630017 is about 825.0560192142.

The spelling of 561630017 in words is "five hundred sixty-one million, six hundred thirty thousand, seventeen".