491830105636 has 27 divisors (see below), whose sum is σ = 868941592659. Its totient is φ = 243583210368.

The previous prime is 491830105583. The next prime is 491830105661. The reversal of 491830105636 is 636501038194.

The square root of 491830105636 is 701306.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 189268502500 + 302561603136 = 435050^2 + 550056^2 .

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 152883100 + ... + 152886316.

Almost surely, 2^491830105636 is an apocalyptic number.

491830105636 is the 701306-th square number.

It is an amenable number.

491830105636 is a deficient number, since it is larger than the sum of its proper divisors (377111487023).

491830105636 is an frugal number, since it uses more digits than its factorization.

491830105636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6656 (or 3328 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 491830105636 in words is "four hundred ninety-one billion, eight hundred thirty million, one hundred five thousand, six hundred thirty-six".