491712528384 has 1080 divisors, whose sum is σ = 1856442957824. Its totient is φ = 122624409600.

The previous prime is 491712528319. The next prime is 491712528389. The reversal of 491712528384 is 483825217194.

491712528384 is a `hidden beast` number, since 4 + 9 + 1 + 7 + 1 + 252 + 8 + 384 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 491712528384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491712528389) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3871752129 + ... + 3871752255.

Almost surely, 2^491712528384 is an apocalyptic number.

491712528384 is a gapful number since it is divisible by the number (44) 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 491712528384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928221478912).

491712528384 is an abundant number, since it is smaller than the sum of its proper divisors (1364730429440).

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

491712528384 is a wasteful number, since it uses less digits than its factorization.

491712528384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 181 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 491712528384 in words is "four hundred ninety-one billion, seven hundred twelve million, five hundred twenty-eight thousand, three hundred eighty-four".