500136561 has 24 divisors (see below), whose sum is σ = 729686880. Its totient is φ = 330088896.

The previous prime is 500136557. The next prime is 500136577. The reversal of 500136561 is 165631005.

It is a happy number.

500136561 is a `hidden beast` number, since 5 + 0 + 0 + 1 + 3 + 656 + 1 = 666.

It is not a de Polignac number, because 500136561 - 2² = 500136557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (500136521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 455365 + ... + 456461.

It is an arithmetic number, because the mean of its divisors is an integer number (30403620).

Almost surely, 2^500136561 is an apocalyptic number.

It is an amenable number.

500136561 is a deficient number, since it is larger than the sum of its proper divisors (229550319).

500136561 is a wasteful number, since it uses less digits than its factorization.

500136561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565 (or 1562 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 500136561 is about 22363.7331633160. The cubic root of 500136561 is about 793.7727784316.

Adding to 500136561 its reverse (165631005), we get a palindrome (665767566).

The spelling of 500136561 in words is "five hundred million, one hundred thirty-six thousand, five hundred sixty-one".