505055555055 has 96 divisors (see below), whose sum is σ = 921720384000. Its totient is φ = 255457278720.

The previous prime is 505055555051. The next prime is 505055555057. The reversal of 505055555055 is 550555550505.

It is not a de Polignac number, because 505055555055 - 2² = 505055555051 is a prime.

It is a super-2 number, since 2×505055555055² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 505055555055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505055555051) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 144671860 + ... + 144675350.

It is an arithmetic number, because the mean of its divisors is an integer number (9601254000).

Almost surely, 2^505055555055 is an apocalyptic number.

505055555055 is a deficient number, since it is larger than the sum of its proper divisors (416664828945).

505055555055 is a wasteful number, since it uses less digits than its factorization.

505055555055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5469 (or 5466 counting only the distinct ones).

The product of its (nonzero) digits is 1953125, while the sum is 45.

It can be divided in two parts, 5050555 and 55055, that added together give a triangular number (5105610 = T₃₁₉₅).

The spelling of 505055555055 in words is "five hundred five billion, fifty-five million, five hundred fifty-five thousand, fifty-five".