491159670797 has 8 divisors (see below), whose sum is σ = 528865848000. Its totient is φ = 454432874944.

The previous prime is 491159670787. The next prime is 491159670803. The reversal of 491159670797 is 797076951194.

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 491159670797 - 2⁶ = 491159670733 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491159670787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244844297 + ... + 244846302.

It is an arithmetic number, because the mean of its divisors is an integer number (66108231000).

Almost surely, 2^491159670797 is an apocalyptic number.

It is an amenable number.

491159670797 is a deficient number, since it is larger than the sum of its proper divisors (37706177203).

491159670797 is a wasteful number, since it uses less digits than its factorization.

491159670797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489690675.

The product of its (nonzero) digits is 30005640, while the sum is 65.

The spelling of 491159670797 in words is "four hundred ninety-one billion, one hundred fifty-nine million, six hundred seventy thousand, seven hundred ninety-seven".