491445037168 has 80 divisors (see below), whose sum is σ = 1038041596800. Its totient is φ = 224504421120.

The previous prime is 491445037133. The next prime is 491445037169. The reversal of 491445037168 is 861730544194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491445037169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7752963 + ... + 7816093.

It is an arithmetic number, because the mean of its divisors is an integer number (12975519960).

Almost surely, 2^491445037168 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 491445037168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519020798400).

491445037168 is an abundant number, since it is smaller than the sum of its proper divisors (546596559632).

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

491445037168 is a wasteful number, since it uses less digits than its factorization.

491445037168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64070 (or 64064 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 491445037168 in words is "four hundred ninety-one billion, four hundred forty-five million, thirty-seven thousand, one hundred sixty-eight".