731163718656 has 594 divisors, whose sum is σ = 2551384922658. Its totient is φ = 208809861120.

The previous prime is 731163718603. The next prime is 731163718807. The reversal of 731163718656 is 656817361137.

It can be written as a sum of positive squares in only one way, i.e., 666639590400 + 64524128256 = 816480^2 + 254016^2 .

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

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 329203626 + ... + 329205846.

Almost surely, 2^731163718656 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 731163718656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275692461329).

731163718656 is an abundant number, since it is smaller than the sum of its proper divisors (1820221204002).

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

731163718656 is an frugal number, since it uses more digits than its factorization.

731163718656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279 (or 2233 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The spelling of 731163718656 in words is "seven hundred thirty-one billion, one hundred sixty-three million, seven hundred eighteen thousand, six hundred fifty-six".