505550555000 has 80 divisors (see below), whose sum is σ = 1184855100000. Its totient is φ = 202160448000.

The previous prime is 505550554987. The next prime is 505550555033. The reversal of 505550555000 is 555055505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19432001 + ... + 19457999.

It is an arithmetic number, because the mean of its divisors is an integer number (14810688750).

Almost surely, 2^505550555000 is an apocalyptic number.

505550555000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505550555000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592427550000).

505550555000 is an abundant number, since it is smaller than the sum of its proper divisors (679304545000).

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

505550555000 is a wasteful number, since it uses less digits than its factorization.

505550555000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29914 (or 29895 counting only the distinct ones).

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

The spelling of 505550555000 in words is "five hundred five billion, five hundred fifty million, five hundred fifty-five thousand".