491159279519 has 4 divisors (see below), whose sum is σ = 496222777344. Its totient is φ = 486095781696.

The previous prime is 491159279503. The next prime is 491159279521. The reversal of 491159279519 is 915972951194.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491159279519 - 2⁴ = 491159279503 is a prime.

It is a super-2 number, since 2×491159279519² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491159279579) 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, 2531748767 + ... + 2531748960.

It is an arithmetic number, because the mean of its divisors is an integer number (124055694336).

Almost surely, 2^491159279519 is an apocalyptic number.

491159279519 is a deficient number, since it is larger than the sum of its proper divisors (5063497825).

491159279519 is an equidigital number, since it uses as much as digits as its factorization.

491159279519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5063497824.

The product of its digits is 9185400, while the sum is 62.

The spelling of 491159279519 in words is "four hundred ninety-one billion, one hundred fifty-nine million, two hundred seventy-nine thousand, five hundred nineteen".