491705961010000 has 200 divisors, whose sum is σ = 1299281275077984. Its totient is φ = 178721282880000.

The previous prime is 491705961009959. The next prime is 491705961010051. The reversal of 491705961010000 is 10169507194.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (200).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 242420047 + ... + 244439953.

Almost surely, 2^{491705961010000} is an apocalyptic number.

491705961010000 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 491705961010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649640637538992).

491705961010000 is an abundant number, since it is smaller than the sum of its proper divisors (807575314067984).

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

491705961010000 is a wasteful number, since it uses less digits than its factorization.

491705961010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022159 (or 2022138 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 43.

The spelling of 491705961010000 in words is "four hundred ninety-one trillion, seven hundred five billion, nine hundred sixty-one million, ten thousand".