491869432992 has 192 divisors, whose sum is σ = 1484593173504. Its totient is φ = 139680583680.

The previous prime is 491869432987. The next prime is 491869433021. The reversal of 491869432992 is 299234968194.

It is a super-2 number, since 2×491869432992² (a number of 24 digits) contains 22 as substring.

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, 104185192 + ... + 104189912.

It is an arithmetic number, because the mean of its divisors is an integer number (7732256112).

Almost surely, 2^491869432992 is an apocalyptic number.

491869432992 is a gapful number since it is divisible by the number (42) 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 491869432992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742296586752).

491869432992 is an abundant number, since it is smaller than the sum of its proper divisors (992723740512).

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

491869432992 is a wasteful number, since it uses less digits than its factorization.

491869432992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5651 (or 5643 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 66.

The spelling of 491869432992 in words is "four hundred ninety-one billion, eight hundred sixty-nine million, four hundred thirty-two thousand, nine hundred ninety-two".