491741773826 has 16 divisors (see below), whose sum is σ = 741073853184. Its totient is φ = 244717613424.

The previous prime is 491741773819. The next prime is 491741773843. The reversal of 491741773826 is 628377147194.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2088365 + ... + 2311871.

It is an arithmetic number, because the mean of its divisors is an integer number (46317115824).

Almost surely, 2^491741773826 is an apocalyptic number.

491741773826 is a deficient number, since it is larger than the sum of its proper divisors (249332079358).

491741773826 is a wasteful number, since it uses less digits than its factorization.

491741773826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228665.

The product of its digits is 14224896, while the sum is 59.

The spelling of 491741773826 in words is "four hundred ninety-one billion, seven hundred forty-one million, seven hundred seventy-three thousand, eight hundred twenty-six".