491116888605 has 192 divisors, whose sum is σ = 984476712960. Its totient is φ = 207819634176.

The previous prime is 491116888589. The next prime is 491116888607. The reversal of 491116888605 is 506888611194.

It is not a de Polignac number, because 491116888605 - 2⁴ = 491116888589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491116888607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 118826119 + ... + 118830251.

It is an arithmetic number, because the mean of its divisors is an integer number (5127482880).

Almost surely, 2^491116888605 is an apocalyptic number.

It is an amenable number.

491116888605 is an abundant number, since it is smaller than the sum of its proper divisors (493359824355).

491116888605 is a wasteful number, since it uses less digits than its factorization.

491116888605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368 (or 4361 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 57.

The spelling of 491116888605 in words is "four hundred ninety-one billion, one hundred sixteen million, eight hundred eighty-eight thousand, six hundred five".