491895016704 has 864 divisors, whose sum is σ = 1869253894144. Its totient is φ = 125500907520.

The previous prime is 491895016637. The next prime is 491895016747. The reversal of 491895016704 is 407610598194.

491895016704 is a `hidden beast` number, since 491 + 8 + 95 + 0 + 1 + 67 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 175487367 + ... + 175490169.

Almost surely, 2^491895016704 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 491895016704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934626947072).

491895016704 is an abundant number, since it is smaller than the sum of its proper divisors (1377358877440).

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

491895016704 is a wasteful number, since it uses less digits than its factorization.

491895016704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885 (or 2859 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 491895016704 in words is "four hundred ninety-one billion, eight hundred ninety-five million, sixteen thousand, seven hundred four".