505005555800 has 96 divisors (see below), whose sum is σ = 1232556825600. Its totient is φ = 192172560000.

The previous prime is 505005555787. The next prime is 505005555841. The reversal of 505005555800 is 8555500505.

It is a super-3 number, since 3×505005555800³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324476 + ... + 1056075.

It is an arithmetic number, because the mean of its divisors is an integer number (12839133600).

Almost surely, 2^505005555800 is an apocalyptic number.

505005555800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505005555800 is an abundant number, since it is smaller than the sum of its proper divisors (727551269800).

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

505005555800 is a wasteful number, since it uses less digits than its factorization.

505005555800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380657 (or 1380648 counting only the distinct ones).

The product of its (nonzero) digits is 125000, while the sum is 38.

The spelling of 505005555800 in words is "five hundred five billion, five million, five hundred fifty-five thousand, eight hundred".