491848811 has 6 divisors (see below), whose sum is σ = 522483300. Its totient is φ = 462916256.

The previous prime is 491848789. The next prime is 491848837. The reversal of 491848811 is 118848194.

It is not a de Polignac number, because 491848811 - 2¹⁴ = 491832427 is a prime.

It is a super-2 number, since 2×491848811² = 483830505764227442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491848871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 850661 + ... + 851238.

It is an arithmetic number, because the mean of its divisors is an integer number (87080550).

Almost surely, 2^491848811 is an apocalyptic number.

491848811 is a deficient number, since it is larger than the sum of its proper divisors (30634489).

491848811 is a wasteful number, since it uses less digits than its factorization.

491848811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701933 (or 1701916 counting only the distinct ones).

The product of its digits is 73728, while the sum is 44.

The square root of 491848811 is about 22177.6646876987. The cubic root of 491848811 is about 789.3638049532.

The spelling of 491848811 in words is "four hundred ninety-one million, eight hundred forty-eight thousand, eight hundred eleven".