505555055566 has 16 divisors (see below), whose sum is σ = 828757157040. Its totient is φ = 229385183680.

The previous prime is 505555055539. The next prime is 505555055581. The reversal of 505555055566 is 665550555505.

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, 20615911 + ... + 20640418.

It is an arithmetic number, because the mean of its divisors is an integer number (51797322315).

Almost surely, 2^505555055566 is an apocalyptic number.

505555055566 is a deficient number, since it is larger than the sum of its proper divisors (323202101474).

505555055566 is a wasteful number, since it uses less digits than its factorization.

505555055566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41256899.

The product of its (nonzero) digits is 14062500, while the sum is 52.

The spelling of 505555055566 in words is "five hundred five billion, five hundred fifty-five million, fifty-five thousand, five hundred sixty-six".