505555055556 has 24 divisors (see below), whose sum is σ = 1198966636224. Its totient is φ = 165755755680.

The previous prime is 505555055539. The next prime is 505555055581. The reversal of 505555055556 is 655550555505.

It is a junction number, because it is equal to n+sod(n) for n = 505555055499 and 505555055508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345323760 + ... + 345325223.

It is an arithmetic number, because the mean of its divisors is an integer number (49956943176).

Almost surely, 2^505555055556 is an apocalyptic number.

It is an amenable number.

505555055556 is an abundant number, since it is smaller than the sum of its proper divisors (693411580668).

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

505555055556 is a wasteful number, since it uses less digits than its factorization.

505555055556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690649051 (or 690649049 counting only the distinct ones).

The product of its (nonzero) digits is 11718750, while the sum is 51.

The spelling of 505555055556 in words is "five hundred five billion, five hundred fifty-five million, fifty-five thousand, five hundred fifty-six".