505555005508 has 36 divisors (see below), whose sum is σ = 1029649800060. Its totient is φ = 216564483072.

The previous prime is 505555005503. The next prime is 505555005521. The reversal of 505555005508 is 805500555505.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 297611709444 + 207943296064 = 545538^2 + 456008^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (505555005503) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 188485 + ... + 1023052.

It is an arithmetic number, because the mean of its divisors is an integer number (28601383335).

Almost surely, 2^505555005508 is an apocalyptic number.

It is an amenable number.

505555005508 is an abundant number, since it is smaller than the sum of its proper divisors (524094794552).

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

505555005508 is a wasteful number, since it uses less digits than its factorization.

505555005508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213684 (or 1213675 counting only the distinct ones).

The product of its (nonzero) digits is 625000, while the sum is 43.

The spelling of 505555005508 in words is "five hundred five billion, five hundred fifty-five million, five thousand, five hundred eight".