491790273408 has 576 divisors, whose sum is σ = 1705807134720. Its totient is φ = 135461652480.

The previous prime is 491790273383. The next prime is 491790273413. The reversal of 491790273408 is 804372097194.

491790273408 is a `hidden beast` number, since 49 + 179 + 0 + 27 + 3 + 408 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 810197841 + ... + 810198447.

It is an arithmetic number, because the mean of its divisors is an integer number (2961470720).

Almost surely, 2^491790273408 is an apocalyptic number.

491790273408 is a gapful number since it is divisible by the number (48) 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 491790273408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852903567360).

491790273408 is an abundant number, since it is smaller than the sum of its proper divisors (1214016861312).

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

491790273408 is a wasteful number, since it uses less digits than its factorization.

491790273408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 491790273408 in words is "four hundred ninety-one billion, seven hundred ninety million, two hundred seventy-three thousand, four hundred eight".