491936096256 has 448 divisors, whose sum is σ = 1494758707200. Its totient is φ = 142534246400.

The previous prime is 491936096231. The next prime is 491936096269. The reversal of 491936096256 is 652690639194.

It is a super-2 number, since 2×491936096256² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491936096256.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1027006225 + ... + 1027006703.

Almost surely, 2^491936096256 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 491936096256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747379353600).

491936096256 is an abundant number, since it is smaller than the sum of its proper divisors (1002822610944).

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

491936096256 is a wasteful number, since it uses less digits than its factorization.

491936096256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 60.

The spelling of 491936096256 in words is "four hundred ninety-one billion, nine hundred thirty-six million, ninety-six thousand, two hundred fifty-six".