561539005 has 16 divisors (see below), whose sum is σ = 682381440. Its totient is φ = 443567808.

The previous prime is 561538969. The next prime is 561539023. The reversal of 561539005 is 500935165.

It is a cyclic number.

It is not a de Polignac number, because 561539005 - 2⁹ = 561538493 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 198934 + ... + 201736.

It is an arithmetic number, because the mean of its divisors is an integer number (42648840).

Almost surely, 2^561539005 is an apocalyptic number.

It is an amenable number.

561539005 is a deficient number, since it is larger than the sum of its proper divisors (120842435).

561539005 is a wasteful number, since it uses less digits than its factorization.

561539005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 561539005 is about 23696.8142373611. The cubic root of 561539005 is about 825.0114501013.

The spelling of 561539005 in words is "five hundred sixty-one million, five hundred thirty-nine thousand, five".