491963823535 has 8 divisors (see below), whose sum is σ = 606312171936. Its totient is φ = 382934003040.

The previous prime is 491963823517. The next prime is 491963823551. The reversal of 491963823535 is 535328369194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491963823535 - 2⁹ = 491963823023 is a prime.

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 491963823535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329631771 + ... + 1329632140.

It is an arithmetic number, because the mean of its divisors is an integer number (75789021492).

Almost surely, 2^491963823535 is an apocalyptic number.

491963823535 is a deficient number, since it is larger than the sum of its proper divisors (114348348401).

491963823535 is a wasteful number, since it uses less digits than its factorization.

491963823535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659263953.

The product of its digits is 20995200, while the sum is 58.

The spelling of 491963823535 in words is "four hundred ninety-one billion, nine hundred sixty-three million, eight hundred twenty-three thousand, five hundred thirty-five".