491655725496 has 96 divisors (see below), whose sum is σ = 1435797286560. Its totient is φ = 151088645376.

The previous prime is 491655725479. The next prime is 491655725507. The reversal of 491655725496 is 694527556194.

491655725496 is a `hidden beast` number, since 4 + 9 + 1 + 6 + 5 + 572 + 54 + 9 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 416461 + ... + 1075523.

It is an arithmetic number, because the mean of its divisors is an integer number (14956221735).

Almost surely, 2^491655725496 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 491655725496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717898643280).

491655725496 is an abundant number, since it is smaller than the sum of its proper divisors (944141561064).

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

491655725496 is a wasteful number, since it uses less digits than its factorization.

491655725496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659885 (or 659878 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 63.

The spelling of 491655725496 in words is "four hundred ninety-one billion, six hundred fifty-five million, seven hundred twenty-five thousand, four hundred ninety-six".