505555560056 has 64 divisors (see below), whose sum is σ = 990073173600. Its totient is φ = 241784524800.

The previous prime is 505555560053. The next prime is 505555560089. The reversal of 505555560056 is 650065555505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505555560053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25875011 + ... + 25894541.

Almost surely, 2^505555560056 is an apocalyptic number.

It is an amenable number.

505555560056 is a deficient number, since it is larger than the sum of its proper divisors (484517613544).

505555560056 is a wasteful number, since it uses less digits than its factorization.

505555560056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120 (or 21116 counting only the distinct ones).

The product of its (nonzero) digits is 2812500, while the sum is 47.

The spelling of 505555560056 in words is "five hundred five billion, five hundred fifty-five million, five hundred sixty thousand, fifty-six".