561738724 has 48 divisors (see below), whose sum is σ = 1075916800. Its totient is φ = 255636000.

The previous prime is 561738703. The next prime is 561738731. The reversal of 561738724 is 427837165.

It is a super-2 number, since 2×561738724² = 631100788082296352, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354967 + ... + 356545.

Almost surely, 2^561738724 is an apocalyptic number.

It is an amenable number.

561738724 is a deficient number, since it is larger than the sum of its proper divisors (514178076).

561738724 is a wasteful number, since it uses less digits than its factorization.

561738724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784 (or 1782 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 561738724 is about 23701.0279101983. The cubic root of 561738724 is about 825.1092473631.

The spelling of 561738724 in words is "five hundred sixty-one million, seven hundred thirty-eight thousand, seven hundred twenty-four".