505505555055 has 16 divisors (see below), whose sum is σ = 898676542560. Its totient is φ = 269602962624.

The previous prime is 505505555053. The next prime is 505505555057. The reversal of 505505555055 is 550555505505.

It is an interprime number because it is at equal distance from previous prime (505505555053) and next prime (505505555057).

It is not a de Polignac number, because 505505555055 - 2¹ = 505505555053 is a prime.

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 505505555055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505505555053) 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, 1872242662 + ... + 1872242931.

It is an arithmetic number, because the mean of its divisors is an integer number (56167283910).

Almost surely, 2^505505555055 is an apocalyptic number.

505505555055 is a deficient number, since it is larger than the sum of its proper divisors (393170987505).

505505555055 is a wasteful number, since it uses less digits than its factorization.

505505555055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744485607 (or 3744485601 counting only the distinct ones).

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

The spelling of 505505555055 in words is "five hundred five billion, five hundred five million, five hundred fifty-five thousand, fifty-five".