561539745 has 48 divisors (see below), whose sum is σ = 1058121792. Its totient is φ = 273836160.

The previous prime is 561539743. The next prime is 561539747. The reversal of 561539745 is 547935165.

It is an interprime number because it is at equal distance from previous prime (561539743) and next prime (561539747).

It is not a de Polignac number, because 561539745 - 2¹ = 561539743 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 561539745.

It is not an unprimeable number, because it can be changed into a prime (561539743) 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 47 ways as a sum of consecutive naturals, for example, 58110 + ... + 67080.

It is an arithmetic number, because the mean of its divisors is an integer number (22044204).

Almost surely, 2^561539745 is an apocalyptic number.

It is an amenable number.

561539745 is a deficient number, since it is larger than the sum of its proper divisors (496582047).

561539745 is a wasteful number, since it uses less digits than its factorization.

561539745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9102 (or 9099 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 561539745 is about 23696.8298512691. The cubic root of 561539745 is about 825.0118125030.

The spelling of 561539745 in words is "five hundred sixty-one million, five hundred thirty-nine thousand, seven hundred forty-five".