561697072 has 20 divisors (see below), whose sum is σ = 1089317680. Its totient is φ = 280582848.

The previous prime is 561697049. The next prime is 561697079. The reversal of 561697072 is 270796165.

It is not an unprimeable number, because it can be changed into a prime (561697079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429 + ... + 33547.

It is an arithmetic number, because the mean of its divisors is an integer number (54465884).

Almost surely, 2^561697072 is an apocalyptic number.

It is an amenable number.

561697072 is a deficient number, since it is larger than the sum of its proper divisors (527620608).

561697072 is a wasteful number, since it uses less digits than its factorization.

561697072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33220 (or 33214 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 561697072 is about 23700.1491978426. The cubic root of 561697072 is about 825.0888533624.

The spelling of 561697072 in words is "five hundred sixty-one million, six hundred ninety-seven thousand, seventy-two".