505556556 has 24 divisors (see below), whose sum is σ = 1217685504. Its totient is φ = 163082640.

The previous prime is 505556549. The next prime is 505556561. The reversal of 505556556 is 655655505.

It is a super-2 number, since 2×505556556² = 511174862629162272, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 679140 + ... + 679883.

It is an arithmetic number, because the mean of its divisors is an integer number (50736896).

Almost surely, 2^505556556 is an apocalyptic number.

It is an amenable number.

505556556 is an abundant number, since it is smaller than the sum of its proper divisors (712128948).

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

505556556 is a wasteful number, since it uses less digits than its factorization.

505556556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359061 (or 1359059 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 42.

The square root of 505556556 is about 22484.5848527386. The cubic root of 505556556 is about 796.6298622338.

The spelling of 505556556 in words is "five hundred five million, five hundred fifty-six thousand, five hundred fifty-six".