539268561 has 12 divisors (see below), whose sum is σ = 838862388. Its totient is φ = 331857504.

The previous prime is 539268559. The next prime is 539268563. The reversal of 539268561 is 165862935.

539268561 is a `hidden beast` number, since 539 + 2 + 68 + 56 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (539268559) and next prime (539268563).

It can be written as a sum of positive squares in 2 ways, for example, as 255008961 + 284259600 = 15969^2 + 16860^2 .

It is not a de Polignac number, because 539268561 - 2¹ = 539268559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (539268563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2304450 + ... + 2304683.

It is an arithmetic number, because the mean of its divisors is an integer number (69905199).

Almost surely, 2^539268561 is an apocalyptic number.

It is an amenable number.

539268561 is a deficient number, since it is larger than the sum of its proper divisors (299593827).

539268561 is a wasteful number, since it uses less digits than its factorization.

539268561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609152 (or 4609149 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 539268561 is about 23222.1566827890. The cubic root of 539268561 is about 813.9574464571.

The spelling of 539268561 in words is "five hundred thirty-nine million, two hundred sixty-eight thousand, five hundred sixty-one".