505555500550 has 24 divisors (see below), whose sum is σ = 940494215232. Its totient is φ = 202187580000.

The previous prime is 505555500539. The next prime is 505555500559. The reversal of 505555500550 is 55005555505.

It is a super-2 number, since 2×505555500550² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505555500559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 569526 + ... + 1155625.

It is an arithmetic number, because the mean of its divisors is an integer number (39187258968).

Almost surely, 2^505555500550 is an apocalyptic number.

505555500550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

505555500550 is a deficient number, since it is larger than the sum of its proper divisors (434938714682).

505555500550 is a wasteful number, since it uses less digits than its factorization.

505555500550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731024 (or 1731019 counting only the distinct ones).

The product of its (nonzero) digits is 390625, while the sum is 40.

The spelling of 505555500550 in words is "five hundred five billion, five hundred fifty-five million, five hundred thousand, five hundred fifty".