491219694895 has 8 divisors (see below), whose sum is σ = 590736776256. Its totient is φ = 392126994336.

The previous prime is 491219694893. The next prime is 491219695007. The reversal of 491219694895 is 598496912194.

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 491219694895 - 2¹ = 491219694893 is a prime.

It is a super-2 number, since 2×491219694895² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491219694895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491219694893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106092652 + ... + 106097281.

It is an arithmetic number, because the mean of its divisors is an integer number (73842097032).

Almost surely, 2^491219694895 is an apocalyptic number.

491219694895 is a deficient number, since it is larger than the sum of its proper divisors (99517081361).

491219694895 is a wasteful number, since it uses less digits than its factorization.

491219694895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212190401.

The product of its digits is 50388480, while the sum is 67.

The spelling of 491219694895 in words is "four hundred ninety-one billion, two hundred nineteen million, six hundred ninety-four thousand, eight hundred ninety-five".