561577317 has 16 divisors (see below), whose sum is σ = 868511232. Its totient is φ = 316110960.

The previous prime is 561577309. The next prime is 561577327. The reversal of 561577317 is 713775165.

It is not a de Polignac number, because 561577317 - 2³ = 561577309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561577327) 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 15 ways as a sum of consecutive naturals, for example, 198159 + ... + 200972.

It is an arithmetic number, because the mean of its divisors is an integer number (54281952).

Almost surely, 2^561577317 is an apocalyptic number.

It is an amenable number.

561577317 is a deficient number, since it is larger than the sum of its proper divisors (306933915).

561577317 is a wasteful number, since it uses less digits than its factorization.

561577317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399208.

The product of its digits is 154350, while the sum is 42.

The square root of 561577317 is about 23697.6226022781. The cubic root of 561577317 is about 825.0302123004.

The spelling of 561577317 in words is "five hundred sixty-one million, five hundred seventy-seven thousand, three hundred seventeen".