505611500 has 48 divisors (see below), whose sum is σ = 1106554176. Its totient is φ = 201824000.

The previous prime is 505611497. The next prime is 505611503. The reversal of 505611500 is 5116505.

It is an interprime number because it is at equal distance from previous prime (505611497) and next prime (505611503).

It is not an unprimeable number, because it can be changed into a prime (505611503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370820 + ... + 372180.

It is an arithmetic number, because the mean of its divisors is an integer number (23053212).

Almost surely, 2^505611500 is an apocalyptic number.

505611500 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 505611500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553277088).

505611500 is an abundant number, since it is smaller than the sum of its proper divisors (600942676).

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

505611500 is a wasteful number, since it uses less digits than its factorization.

505611500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 505611500 is about 22485.8066344083. The cubic root of 505611500 is about 796.6587204925.

The spelling of 505611500 in words is "five hundred five million, six hundred eleven thousand, five hundred".