491018503783 has 8 divisors (see below), whose sum is σ = 520001847360. Its totient is φ = 462046260480.

The previous prime is 491018503711. The next prime is 491018503813. The reversal of 491018503783 is 387305810194.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 491018503783 - 2²¹ = 491016406631 is a prime.

It is a super-2 number, since 2×491018503783² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491018503883) 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, 2683903 + ... + 2861008.

It is an arithmetic number, because the mean of its divisors is an integer number (65000230920).

Almost surely, 2^491018503783 is an apocalyptic number.

491018503783 is a deficient number, since it is larger than the sum of its proper divisors (28983343577).

491018503783 is a wasteful number, since it uses less digits than its factorization.

491018503783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550137.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 491018503783 in words is "four hundred ninety-one billion, eighteen million, five hundred three thousand, seven hundred eighty-three".