505305025550 has 48 divisors (see below), whose sum is σ = 1017464378112. Its totient is φ = 185597289600.

The previous prime is 505305025549. The next prime is 505305025609. The reversal of 505305025550 is 55520503505.

It is a self number, because there is not a number n which added to its sum of digits gives 505305025550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1910909 + ... + 2159208.

It is an arithmetic number, because the mean of its divisors is an integer number (21197174544).

Almost surely, 2^505305025550 is an apocalyptic number.

505305025550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505305025550 is an abundant number, since it is smaller than the sum of its proper divisors (512159352562).

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

505305025550 is a wasteful number, since it uses less digits than its factorization.

505305025550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070333 (or 4070328 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 35.

The spelling of 505305025550 in words is "five hundred five billion, three hundred five million, twenty-five thousand, five hundred fifty".