505505005550 has 96 divisors (see below), whose sum is σ = 977862412800. Its totient is φ = 194278210560.

The previous prime is 505505005541. The next prime is 505505005553. The reversal of 505505005550 is 55500505505.

It is a super-2 number, since 2×505505005550² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 505505005550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505505005553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122425886 + ... + 122430014.

It is an arithmetic number, because the mean of its divisors is an integer number (10186066800).

Almost surely, 2^505505005550 is an apocalyptic number.

505505005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505505005550 is a deficient number, since it is larger than the sum of its proper divisors (472357407250).

505505005550 is a wasteful number, since it uses less digits than its factorization.

505505005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130 (or 5125 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 35.

The spelling of 505505005550 in words is "five hundred five billion, five hundred five million, five thousand, five hundred fifty".