505506555 has 16 divisors (see below), whose sum is σ = 898678560. Its totient is φ = 269603424.

The previous prime is 505506541. The next prime is 505506557. The reversal of 505506555 is 555605505.

505506555 is a `hidden beast` number, since 50 + 5 + 50 + 6 + 555 = 666.

It is not a de Polignac number, because 505506555 - 2⁵ = 505506523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505506557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1872112 + ... + 1872381.

It is an arithmetic number, because the mean of its divisors is an integer number (56167410).

Almost surely, 2^505506555 is an apocalyptic number.

505506555 is a deficient number, since it is larger than the sum of its proper divisors (393172005).

505506555 is a wasteful number, since it uses less digits than its factorization.

505506555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744507 (or 3744501 counting only the distinct ones).

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

The square root of 505506555 is about 22483.4729301325. The cubic root of 505506555 is about 796.6035983717.

The spelling of 505506555 in words is "five hundred five million, five hundred six thousand, five hundred fifty-five".