505555500 has 192 divisors, whose sum is σ = 1539772416. Its totient is φ = 128800000.

The previous prime is 505555481. The next prime is 505555507. The reversal of 505555500 is 5555505.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (505555507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5005450 + ... + 5005550.

It is an arithmetic number, because the mean of its divisors is an integer number (8019648).

Almost surely, 2^505555500 is an apocalyptic number.

505555500 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 505555500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769886208).

505555500 is an abundant number, since it is smaller than the sum of its proper divisors (1034216916).

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

505555500 is a wasteful number, since it uses less digits than its factorization.

505555500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 30.

The square root of 505555500 is about 22484.5613699712. The cubic root of 505555500 is about 796.6293075700.

The spelling of 505555500 in words is "five hundred five million, five hundred fifty-five thousand, five hundred".