491604181316 has 12 divisors (see below), whose sum is σ = 860376168960. Its totient is φ = 245782418760.

The previous prime is 491604181303. The next prime is 491604181319. The reversal of 491604181316 is 613181406194.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (491604181319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4861676 + ... + 4961763.

It is an arithmetic number, because the mean of its divisors is an integer number (71698014080).

Almost surely, 2^491604181316 is an apocalyptic number.

It is an amenable number.

491604181316 is a deficient number, since it is larger than the sum of its proper divisors (368771987644).

491604181316 is a wasteful number, since it uses less digits than its factorization.

491604181316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835954 (or 9835952 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 491604181316 in words is "four hundred ninety-one billion, six hundred four million, one hundred eighty-one thousand, three hundred sixteen".