491580085 has 16 divisors (see below), whose sum is σ = 606380544. Its totient is φ = 382358592.

The previous prime is 491580059. The next prime is 491580121. The reversal of 491580085 is 580085194.

It is a cyclic number.

It is not a de Polignac number, because 491580085 - 2⁵ = 491580053 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 42819 + ... + 53071.

It is an arithmetic number, because the mean of its divisors is an integer number (37898784).

Almost surely, 2^491580085 is an apocalyptic number.

It is an amenable number.

491580085 is a deficient number, since it is larger than the sum of its proper divisors (114800459).

491580085 is a wasteful number, since it uses less digits than its factorization.

491580085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 491580085 is about 22171.6053771485. The cubic root of 491580085 is about 789.2200201041.

The spelling of 491580085 in words is "four hundred ninety-one million, five hundred eighty thousand, eighty-five".