491655827833 has 16 divisors (see below), whose sum is σ = 521723235600. Its totient is φ = 461716940800.

The previous prime is 491655827821. The next prime is 491655827849. The reversal of 491655827833 is 338728556194.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4000815504 + 487655012329 = 63252^2 + 698323^2 .

It is a cyclic number.

It is not a de Polignac number, because 491655827833 - 2⁵ = 491655827801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491655827863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14624103 + ... + 14657683.

It is an arithmetic number, because the mean of its divisors is an integer number (32607702225).

Almost surely, 2^491655827833 is an apocalyptic number.

It is an amenable number.

491655827833 is a deficient number, since it is larger than the sum of its proper divisors (30067407767).

491655827833 is a wasteful number, since it uses less digits than its factorization.

491655827833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35468.

The product of its digits is 43545600, while the sum is 61.

The spelling of 491655827833 in words is "four hundred ninety-one billion, six hundred fifty-five million, eight hundred twenty-seven thousand, eight hundred thirty-three".