491648085 has 24 divisors (see below), whose sum is σ = 897043680. Its totient is φ = 248411232.

The previous prime is 491648083. The next prime is 491648099. The reversal of 491648085 is 580846194.

491648085 is a `hidden beast` number, since 4 + 91 + 6 + 480 + 85 = 666.

It is not a de Polignac number, because 491648085 - 2¹ = 491648083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 491648085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491648083) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 286659 + ... + 288368.

It is an arithmetic number, because the mean of its divisors is an integer number (37376820).

Almost surely, 2^491648085 is an apocalyptic number.

491648085 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491648085 is a deficient number, since it is larger than the sum of its proper divisors (405395595).

491648085 is a wasteful number, since it uses less digits than its factorization.

491648085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575057 (or 575054 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 491648085 is about 22173.1388170462. The cubic root of 491648085 is about 789.2564092152.

The spelling of 491648085 in words is "four hundred ninety-one million, six hundred forty-eight thousand, eighty-five".