561105506166 has 16 divisors (see below), whose sum is σ = 1122272921088. Its totient is φ = 187024850600.

The previous prime is 561105506113. The next prime is 561105506177. The reversal of 561105506166 is 661605501165.

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 7 ways as a sum of consecutive naturals, for example, 2461290 + ... + 2679581.

It is an arithmetic number, because the mean of its divisors is an integer number (70142057568).

Almost surely, 2^561105506166 is an apocalyptic number.

561105506166 is an abundant number, since it is smaller than the sum of its proper divisors (561167414922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561105506166 is a wasteful number, since it uses less digits than its factorization.

561105506166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159067.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 561105506166 in words is "five hundred sixty-one billion, one hundred five million, five hundred six thousand, one hundred sixty-six".