561108561117 has 64 divisors (see below), whose sum is σ = 837490752000. Its totient is φ = 331789086720.

The previous prime is 561108561113. The next prime is 561108561137. The reversal of 561108561117 is 711165801165.

It is not a de Polignac number, because 561108561117 - 2² = 561108561113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561108561113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 371348392 + ... + 371349902.

It is an arithmetic number, because the mean of its divisors is an integer number (13085793000).

Almost surely, 2^561108561117 is an apocalyptic number.

It is an amenable number.

561108561117 is a deficient number, since it is larger than the sum of its proper divisors (276382190883).

561108561117 is a wasteful number, since it uses less digits than its factorization.

561108561117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918.

The product of its (nonzero) digits is 50400, while the sum is 42.

The spelling of 561108561117 in words is "five hundred sixty-one billion, one hundred eight million, five hundred sixty-one thousand, one hundred seventeen".