491509354852 has 48 divisors (see below), whose sum is σ = 872559297792. Its totient is φ = 242231460480.

The previous prime is 491509354841. The next prime is 491509354937. The reversal of 491509354852 is 258453905194.

It is a junction number, because it is equal to n+sod(n) for n = 491509354793 and 491509354802.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102118798 + ... + 102123610.

It is an arithmetic number, because the mean of its divisors is an integer number (18178318704).

Almost surely, 2^491509354852 is an apocalyptic number.

It is an amenable number.

491509354852 is a deficient number, since it is larger than the sum of its proper divisors (381049942940).

491509354852 is a wasteful number, since it uses less digits than its factorization.

491509354852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6028 (or 6026 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 55.

The spelling of 491509354852 in words is "four hundred ninety-one billion, five hundred nine million, three hundred fifty-four thousand, eight hundred fifty-two".