491909222548 has 12 divisors (see below), whose sum is σ = 861530372500. Its totient is φ = 245757687552.

The previous prime is 491909222543. The next prime is 491909222617. The reversal of 491909222548 is 845222909194.

It can be written as a sum of positive squares in 2 ways, for example, as 247697326864 + 244211895684 = 497692^2 + 494178^2 .

It is a super-2 number, since 2×491909222548² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491909222543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 49225311 + ... + 49235302.

Almost surely, 2^491909222548 is an apocalyptic number.

It is an amenable number.

491909222548 is a deficient number, since it is larger than the sum of its proper divisors (369621149952).

491909222548 is a wasteful number, since it uses less digits than its factorization.

491909222548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98461866 (or 98461864 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 491909222548 in words is "four hundred ninety-one billion, nine hundred nine million, two hundred twenty-two thousand, five hundred forty-eight".