561730768 has 20 divisors (see below), whose sum is σ = 1089723780. Its totient is φ = 280511744.

The previous prime is 561730759. The next prime is 561730823. The reversal of 561730768 is 867037165.

It can be written as a sum of positive squares in 2 ways, for example, as 504092304 + 57638464 = 22452^2 + 7592^2 .

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, 8755 + ... + 34642.

It is an arithmetic number, because the mean of its divisors is an integer number (54486189).

Almost surely, 2^561730768 is an apocalyptic number.

It is an amenable number.

561730768 is a deficient number, since it is larger than the sum of its proper divisors (527993012).

561730768 is a wasteful number, since it uses less digits than its factorization.

561730768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44214 (or 44208 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 561730768 is about 23700.8600687823. The cubic root of 561730768 is about 825.1053519577.

The spelling of 561730768 in words is "five hundred sixty-one million, seven hundred thirty thousand, seven hundred sixty-eight".