561065684 has 12 divisors (see below), whose sum is σ = 983102484. Its totient is φ = 280179264.

The previous prime is 561065651. The next prime is 561065693. The reversal of 561065684 is 486560165.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 230189584 + 330876100 = 15172^2 + 18190^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84809 + ... + 91184.

It is an arithmetic number, because the mean of its divisors is an integer number (81925207).

Almost surely, 2^561065684 is an apocalyptic number.

It is an amenable number.

561065684 is a deficient number, since it is larger than the sum of its proper divisors (422036800).

561065684 is a wasteful number, since it uses less digits than its factorization.

561065684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176794 (or 176792 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 561065684 is about 23686.8251143964. The cubic root of 561065684 is about 824.7795843368.

The spelling of 561065684 in words is "five hundred sixty-one million, sixty-five thousand, six hundred eighty-four".