561504732 has 12 divisors (see below), whose sum is σ = 1310177736. Its totient is φ = 187168240.

The previous prime is 561504721. The next prime is 561504787. The reversal of 561504732 is 237405165.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×561504732³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561504693 and 561504702.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 23396019 + ... + 23396042.

It is an arithmetic number, because the mean of its divisors is an integer number (109181478).

Almost surely, 2^561504732 is an apocalyptic number.

It is an amenable number.

561504732 is an abundant number, since it is smaller than the sum of its proper divisors (748673004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561504732 is a wasteful number, since it uses less digits than its factorization.

561504732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46792068 (or 46792066 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 561504732 is about 23696.0910700478. The cubic root of 561504732 is about 824.9946651629.

Adding to 561504732 its reverse (237405165), we get a palindrome (798909897).

The spelling of 561504732 in words is "five hundred sixty-one million, five hundred four thousand, seven hundred thirty-two".