505555555 has 4 divisors (see below), whose sum is σ = 606666672. Its totient is φ = 404444440.

The previous prime is 505555541. The next prime is 505555577. The reversal of 505555555 is 555555505.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 505555555 - 2¹³ = 505547363 is a prime.

It is a Duffinian number.

505555555 is a modest number, since divided by 55555 gives 5055 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50555551 + ... + 50555560.

It is an arithmetic number, because the mean of its divisors is an integer number (151666668).

Almost surely, 2^505555555 is an apocalyptic number.

505555555 is a deficient number, since it is larger than the sum of its proper divisors (101111117).

505555555 is a wasteful number, since it uses less digits than its factorization.

505555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101111116.

The product of its (nonzero) digits is 390625, while the sum is 40.

The square root of 505555555 is about 22484.5625930326. The cubic root of 505555555 is about 796.6293364588.

The spelling of 505555555 in words is "five hundred five million, five hundred fifty-five thousand, five hundred fifty-five".