491655715488 has 720 divisors, whose sum is σ = 1792993999104. Its totient is φ = 131469972480.

The previous prime is 491655715487. The next prime is 491655715501. The reversal of 491655715488 is 884517556194.

491655715488 is a `hidden beast` number, since 4 + 9 + 1 + 6 + 5 + 571 + 54 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (491655715487) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 137293858 + ... + 137297438.

Almost surely, 2^491655715488 is an apocalyptic number.

491655715488 is a gapful number since it is divisible by the number (48) 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 491655715488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (896496999552).

491655715488 is an abundant number, since it is smaller than the sum of its proper divisors (1301338283616).

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

491655715488 is a wasteful number, since it uses less digits than its factorization.

491655715488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687 (or 3663 counting only the distinct ones).

The product of its digits is 48384000, while the sum is 63.

The spelling of 491655715488 in words is "four hundred ninety-one billion, six hundred fifty-five million, seven hundred fifteen thousand, four hundred eighty-eight".