491656197124 has 81 divisors (see below), whose sum is σ = 938689429951. Its totient is φ = 225275752960.

The previous prime is 491656197103. The next prime is 491656197157. The reversal of 491656197124 is 421791656194.

The square root of 491656197124 is 701182.

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 34636932100 + 457019265024 = 186110^2 + 676032^2 .

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 26 ways as a sum of consecutive naturals, for example, 977447457 + ... + 977447959.

Almost surely, 2^491656197124 is an apocalyptic number.

491656197124 is the 701182-nd square number.

It is an amenable number.

491656197124 is a deficient number, since it is larger than the sum of its proper divisors (447033232827).

491656197124 is an equidigital number, since it uses as much as digits as its factorization.

491656197124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126 (or 563 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 55.

The spelling of 491656197124 in words is "four hundred ninety-one billion, six hundred fifty-six million, one hundred ninety-seven thousand, one hundred twenty-four".