561535959 has 24 divisors (see below), whose sum is σ = 814797648. Its totient is φ = 343720960.

The previous prime is 561535951. The next prime is 561535967. The reversal of 561535959 is 959535165.

It is an interprime number because it is at equal distance from previous prime (561535951) and next prime (561535967).

It is not a de Polignac number, because 561535959 - 2³ = 561535951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561535951) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 27649 + ... + 43445.

It is an arithmetic number, because the mean of its divisors is an integer number (33949902).

Almost surely, 2^561535959 is an apocalyptic number.

561535959 is a deficient number, since it is larger than the sum of its proper divisors (253261689).

561535959 is a wasteful number, since it uses less digits than its factorization.

561535959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15875 (or 15858 counting only the distinct ones).

The product of its digits is 911250, while the sum is 48.

The square root of 561535959 is about 23696.7499670313. The cubic root of 561535959 is about 825.0099583738.

The spelling of 561535959 in words is "five hundred sixty-one million, five hundred thirty-five thousand, nine hundred fifty-nine".