491968196 has 12 divisors (see below), whose sum is σ = 875537040. Its totient is φ = 241814760.

The previous prime is 491968193. The next prime is 491968249. The reversal of 491968196 is 691869194.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (491968193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042070 + ... + 1042541.

It is an arithmetic number, because the mean of its divisors is an integer number (72961420).

Almost surely, 2^491968196 is an apocalyptic number.

It is an amenable number.

491968196 is a deficient number, since it is larger than the sum of its proper divisors (383568844).

491968196 is a wasteful number, since it uses less digits than its factorization.

491968196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084674 (or 2084672 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 491968196 is about 22180.3560837061. The cubic root of 491968196 is about 789.4276664299.

The spelling of 491968196 in words is "four hundred ninety-one million, nine hundred sixty-eight thousand, one hundred ninety-six".