561108561405 has 32 divisors (see below), whose sum is σ = 1086381621504. Its totient is φ = 241418136576.

The previous prime is 561108561389. The next prime is 561108561413. The reversal of 561108561405 is 504165801165.

It is a happy number.

It is not a de Polignac number, because 561108561405 - 2⁴ = 561108561389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157171482 + ... + 157175051.

It is an arithmetic number, because the mean of its divisors is an integer number (33949425672).

Almost surely, 2^561108561405 is an apocalyptic number.

It is an amenable number.

561108561405 is a deficient number, since it is larger than the sum of its proper divisors (525273060099).

561108561405 is a wasteful number, since it uses less digits than its factorization.

561108561405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314346565.

The product of its (nonzero) digits is 144000, while the sum is 42.

The spelling of 561108561405 in words is "five hundred sixty-one billion, one hundred eight million, five hundred sixty-one thousand, four hundred five".