505565505 has 12 divisors (see below), whose sum is σ = 876313620. Its totient is φ = 269634912.

The previous prime is 505565449. The next prime is 505565519.

505565505 is a `hidden beast` number, since 50 + 5 + 56 + 550 + 5 = 666.

505565505 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 299843856 + 205721649 = 17316^2 + 14343^2 .

It is not a de Polignac number, because 505565505 - 2¹² = 505561409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505565505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5617350 + ... + 5617439.

It is an arithmetic number, because the mean of its divisors is an integer number (73026135).

Almost surely, 2^505565505 is an apocalyptic number.

It is an amenable number.

505565505 is a deficient number, since it is larger than the sum of its proper divisors (370748115).

505565505 is a wasteful number, since it uses less digits than its factorization.

505565505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11234800 (or 11234797 counting only the distinct ones).

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

The square root of 505565505 is about 22484.7838548650. The cubic root of 505565505 is about 796.6345626631.

The spelling of 505565505 in words is "five hundred five million, five hundred sixty-five thousand, five hundred five".