505505555 has 4 divisors (see below), whose sum is σ = 606606672. Its totient is φ = 404404440.

The previous prime is 505505537. The next prime is 505505579. The reversal of 505505555 is 555505505.

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

It is not a de Polignac number, because 505505555 - 2¹² = 505501459 is a prime.

It is a super-2 number, since 2×505505555² = 511071732271716050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50550551 + ... + 50550560.

It is an arithmetic number, because the mean of its divisors is an integer number (151651668).

Almost surely, 2^505505555 is an apocalyptic number.

505505555 is a deficient number, since it is larger than the sum of its proper divisors (101101117).

505505555 is a wasteful number, since it uses less digits than its factorization.

505505555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101101116.

The product of its (nonzero) digits is 78125, while the sum is 35.

The square root of 505505555 is about 22483.4506915642. The cubic root of 505505555 is about 796.6030730873.

The spelling of 505505555 in words is "five hundred five million, five hundred five thousand, five hundred fifty-five".