491509309082 has 16 divisors (see below), whose sum is σ = 815305606272. Its totient is φ = 220352865120.

The previous prime is 491509309013. The next prime is 491509309091. The reversal of 491509309082 is 280903905194.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 491509309082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153021218 + ... + 153024429.

It is an arithmetic number, because the mean of its divisors is an integer number (50956600392).

Almost surely, 2^491509309082 is an apocalyptic number.

491509309082 is a deficient number, since it is larger than the sum of its proper divisors (323796297190).

491509309082 is a wasteful number, since it uses less digits than its factorization.

491509309082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306045733.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 491509309082 in words is "four hundred ninety-one billion, five hundred nine million, three hundred nine thousand, eighty-two".