491553360 has 200 divisors, whose sum is σ = 1763030016. Its totient is φ = 126800640.

The previous prime is 491553353. The next prime is 491553371. The reversal of 491553360 is 63355194.

491553360 is a `hidden beast` number, since 49 + 1 + 553 + 3 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 199657 + ... + 202103.

Almost surely, 2^491553360 is an apocalyptic number.

491553360 is a gapful number since it is divisible by the number (40) 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 491553360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881515008).

491553360 is an abundant number, since it is smaller than the sum of its proper divisors (1271476656).

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

491553360 is a wasteful number, since it uses less digits than its factorization.

491553360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503 (or 2488 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 491553360 is about 22171.0026836857. The cubic root of 491553360 is about 789.2057177297.

The spelling of 491553360 in words is "four hundred ninety-one million, five hundred fifty-three thousand, three hundred sixty".