797798312658 has 64 divisors (see below), whose sum is σ = 1790699089920. Its totient is φ = 263262416976.

The previous prime is 797798312651. The next prime is 797798312699. The reversal of 797798312658 is 856213897797.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (797798312651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17703591 + ... + 17748597.

It is an arithmetic number, because the mean of its divisors is an integer number (27979673280).

Almost surely, 2^797798312658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 797798312658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895349544960).

797798312658 is an abundant number, since it is smaller than the sum of its proper divisors (992900777262).

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

797798312658 is a wasteful number, since it uses less digits than its factorization.

797798312658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48308 (or 48302 counting only the distinct ones).

The product of its digits is 320060160, while the sum is 72.

The spelling of 797798312658 in words is "seven hundred ninety-seven billion, seven hundred ninety-eight million, three hundred twelve thousand, six hundred fifty-eight".