491115033616 has 45 divisors (see below), whose sum is σ = 1004360940093. Its totient is φ = 232608208320.

The previous prime is 491115033583. The next prime is 491115033637. The reversal of 491115033616 is 616330511194.

The square root of 491115033616 is 700796.

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

It can be written as a sum of positive squares in only one way, i.e., 450246368016 + 40868665600 = 671004^2 + 202160^2 .

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, 53255886 + ... + 53265106.

Almost surely, 2^491115033616 is an apocalyptic number.

491115033616 is the 700796-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491115033616

491115033616 is an abundant number, since it is smaller than the sum of its proper divisors (513245906477).

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

491115033616 is an frugal number, since it uses more digits than its factorization.

491115033616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18488 (or 9242 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 491115033616 in words is "four hundred ninety-one billion, one hundred fifteen million, thirty-three thousand, six hundred sixteen".