500549999991 has 4 divisors (see below), whose sum is σ = 667399999992. Its totient is φ = 333699999992.

The previous prime is 500549999987. The next prime is 500550000007. The reversal of 500549999991 is 199999945005.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 500549999991 - 2² = 500549999987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500549999491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83424999996 + ... + 83425000001.

It is an arithmetic number, because the mean of its divisors is an integer number (166849999998).

Almost surely, 2^500549999991 is an apocalyptic number.

500549999991 is a deficient number, since it is larger than the sum of its proper divisors (166850000001).

500549999991 is a wasteful number, since it uses less digits than its factorization.

500549999991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166850000000.

The product of its (nonzero) digits is 53144100, while the sum is 69.

The spelling of 500549999991 in words is "five hundred billion, five hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".