505555506 has 20 divisors (see below), whose sum is σ = 1132819182. Its totient is φ = 168518448.

The previous prime is 505555481. The next prime is 505555507. The reversal of 505555506 is 605555505.

505555506 is a `hidden beast` number, since 50 + 5 + 55 + 550 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 284765625 + 220789881 = 16875^2 + 14859^2 .

It is not an unprimeable number, because it can be changed into a prime (505555507) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1560195 + ... + 1560518.

Almost surely, 2^505555506 is an apocalyptic number.

505555506 is an abundant number, since it is smaller than the sum of its proper divisors (627263676).

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

505555506 is a wasteful number, since it uses less digits than its factorization.

505555506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120727 (or 3120718 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 36.

The square root of 505555506 is about 22484.5615033961. The cubic root of 505555506 is about 796.6293107215.

Subtracting 505555506 from its reverse (605555505), we obtain a palindrome (99999999).

The spelling of 505555506 in words is "five hundred five million, five hundred fifty-five thousand, five hundred six".