491352834500 has 192 divisors, whose sum is σ = 1252502334720. Its totient is φ = 166492800000.

The previous prime is 491352834463. The next prime is 491352834509. The reversal of 491352834500 is 5438253194.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (491352834509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6335960 + ... + 6413040.

It is an arithmetic number, because the mean of its divisors is an integer number (6523449660).

Almost surely, 2^491352834500 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 491352834500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626251167360).

491352834500 is an abundant number, since it is smaller than the sum of its proper divisors (761149500220).

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

491352834500 is a wasteful number, since it uses less digits than its factorization.

491352834500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77191 (or 77179 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 491352834500 in words is "four hundred ninety-one billion, three hundred fifty-two million, eight hundred thirty-four thousand, five hundred".