491755333841 has 8 divisors (see below), whose sum is σ = 492997833120. Its totient is φ = 490513432032.

The previous prime is 491755333807. The next prime is 491755333859. The reversal of 491755333841 is 148333557194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491755333841 is a prime.

It is a super-2 number, since 2×491755333841² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491755333441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1522406 + ... + 1816928.

It is an arithmetic number, because the mean of its divisors is an integer number (61624729140).

Almost surely, 2^491755333841 is an apocalyptic number.

It is an amenable number.

491755333841 is a deficient number, since it is larger than the sum of its proper divisors (1242499279).

491755333841 is a wasteful number, since it uses less digits than its factorization.

491755333841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298735.

The product of its digits is 5443200, while the sum is 53.

The spelling of 491755333841 in words is "four hundred ninety-one billion, seven hundred fifty-five million, three hundred thirty-three thousand, eight hundred forty-one".