505156500 has 120 divisors (see below), whose sum is σ = 1648214568. Its totient is φ = 134697600.

The previous prime is 505156499. The next prime is 505156529. The reversal of 505156500 is 5651505.

505156500 is a `hidden beast` number, since 5 + 0 + 5 + 1 + 5 + 650 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6170256 + 498986244 = 2484^2 + 22338^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 34264 + ... + 46736.

Almost surely, 2^505156500 is an apocalyptic number.

505156500 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 505156500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824107284).

505156500 is an abundant number, since it is smaller than the sum of its proper divisors (1143058068).

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

505156500 is a wasteful number, since it uses less digits than its factorization.

505156500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12504 (or 12483 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 505156500 is about 22475.6868638091. The cubic root of 505156500 is about 796.4196776014.

The spelling of 505156500 in words is "five hundred five million, one hundred fifty-six thousand, five hundred".