491563093824 has 224 divisors, whose sum is σ = 1582354569600. Its totient is φ = 148403220480.

The previous prime is 491563093793. The next prime is 491563093837. The reversal of 491563093824 is 428390365194.

491563093824 is a `hidden beast` number, since 49 + 1 + 563 + 0 + 9 + 38 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 5065084 + ... + 5161220.

It is an arithmetic number, because the mean of its divisors is an integer number (7064082900).

Almost surely, 2^491563093824 is an apocalyptic number.

491563093824 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491563093824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791177284800).

491563093824 is an abundant number, since it is smaller than the sum of its proper divisors (1090791475776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491563093824 is a wasteful number, since it uses less digits than its factorization.

491563093824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96438 (or 96422 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 491563093824 in words is "four hundred ninety-one billion, five hundred sixty-three million, ninety-three thousand, eight hundred twenty-four".