506161105661 has 8 divisors (see below), whose sum is σ = 523352358144. Its totient is φ = 489200608480.

The previous prime is 506161105651. The next prime is 506161105717. The reversal of 506161105661 is 166501161605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 506161105661 - 2¹⁰ = 506161104637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506161105651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57684365 + ... + 57693138.

It is an arithmetic number, because the mean of its divisors is an integer number (65419044768).

Almost surely, 2^506161105661 is an apocalyptic number.

It is an amenable number.

506161105661 is a deficient number, since it is larger than the sum of its proper divisors (17191252483).

506161105661 is a wasteful number, since it uses less digits than its factorization.

506161105661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115377651.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 506161105661 in words is "five hundred six billion, one hundred sixty-one million, one hundred five thousand, six hundred sixty-one".