491443200000 has 1008 divisors, whose sum is σ = 1863446981760. Its totient is φ = 129392640000.

The previous prime is 491443199983. The next prime is 491443200011. The reversal of 491443200000 is 2344194.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6220799961 + ... + 6220800039.

It is an arithmetic number, because the mean of its divisors is an integer number (1848657720).

Almost surely, 2^491443200000 is an apocalyptic number.

491443200000 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 491443200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931723490880).

491443200000 is an abundant number, since it is smaller than the sum of its proper divisors (1372003781760).

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

491443200000 is an frugal number, since it uses more digits than its factorization.

491443200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 491443200000 its reverse (2344194), we get a palindrome (491445544194).

The spelling of 491443200000 in words is "four hundred ninety-one billion, four hundred forty-three million, two hundred thousand".