491597563392 has 960 divisors, whose sum is σ = 1705165862400. Its totient is φ = 134886850560.

The previous prime is 491597563363. The next prime is 491597563409. The reversal of 491597563392 is 293365795194.

491597563392 is a `hidden beast` number, since 4 + 9 + 1 + 597 + 5 + 6 + 3 + 39 + 2 = 666.

Its product of digits (55112400) is a multiple of the sum of its prime divisors (360).

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 95 ways as a sum of consecutive naturals, for example, 2329846167 + ... + 2329846377.

It is an arithmetic number, because the mean of its divisors is an integer number (1776214440).

Almost surely, 2^491597563392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491597563392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852582931200).

491597563392 is an abundant number, since it is smaller than the sum of its proper divisors (1213568299008).

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

491597563392 is a wasteful number, since it uses less digits than its factorization.

491597563392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 360 counting only the distinct ones).

The product of its digits is 55112400, while the sum is 63.

The spelling of 491597563392 in words is "four hundred ninety-one billion, five hundred ninety-seven million, five hundred sixty-three thousand, three hundred ninety-two".