491501949184 has 81 divisors (see below), whose sum is σ = 1005417147063. Its totient is φ = 239800275456.

The previous prime is 491501949157. The next prime is 491501949193. The reversal of 491501949184 is 481949105194.

It is a happy number.

The square root of 491501949184 is 701072.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 482337027 + ... + 482338045.

Almost surely, 2^491501949184 is an apocalyptic number.

491501949184 is the 701072-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491501949184

491501949184 is an abundant number, since it is smaller than the sum of its proper divisors (513915197879).

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

491501949184 is an frugal number, since it uses more digits than its factorization.

491501949184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 491501949184 in words is "four hundred ninety-one billion, five hundred one million, nine hundred forty-nine thousand, one hundred eighty-four".