491845536 has 288 divisors, whose sum is σ = 1761177600. Its totient is φ = 129378816.

The previous prime is 491845531. The next prime is 491845559. The reversal of 491845536 is 635548194.

491845536 is a `hidden beast` number, since 4 + 91 + 8 + 4 + 553 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a junction number, because it is equal to n+sod(n) for n = 491845491 and 491845500.

It is not an unprimeable number, because it can be changed into a prime (491845531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1284001 + ... + 1284383.

It is an arithmetic number, because the mean of its divisors is an integer number (6115200).

Almost surely, 2^491845536 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 491845536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880588800).

491845536 is an abundant number, since it is smaller than the sum of its proper divisors (1269332064).

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

491845536 is a wasteful number, since it uses less digits than its factorization.

491845536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 408 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 491845536 is about 22177.5908520290. The cubic root of 491845536 is about 789.3620529431.

The spelling of 491845536 in words is "four hundred ninety-one million, eight hundred forty-five thousand, five hundred thirty-six".