500500004991 has 8 divisors (see below), whose sum is σ = 762666674304. Its totient is φ = 286000002840.

The previous prime is 500500004959. The next prime is 500500005001. The reversal of 500500004991 is 199400005005.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 500500004991 - 2⁵ = 500500004959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500500004591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11916666765 + ... + 11916666806.

It is an arithmetic number, because the mean of its divisors is an integer number (95333334288).

Almost surely, 2^500500004991 is an apocalyptic number.

500500004991 is a deficient number, since it is larger than the sum of its proper divisors (262166669313).

500500004991 is a wasteful number, since it uses less digits than its factorization.

500500004991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23833333581.

The product of its (nonzero) digits is 8100, while the sum is 33.

Adding to 500500004991 its reverse (199400005005), we get a palindrome (699900009996).

The spelling of 500500004991 in words is "five hundred billion, five hundred million, four thousand, nine hundred ninety-one".