809238527968 has 96 divisors (see below), whose sum is σ = 1808323604640. Its totient is φ = 353390376960.

The previous prime is 809238527959. The next prime is 809238527969. The reversal of 809238527968 is 869725832908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809238527969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6235258 + ... + 6363718.

It is an arithmetic number, because the mean of its divisors is an integer number (18836704215).

Almost surely, 2^809238527968 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 809238527968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904161802320).

809238527968 is an abundant number, since it is smaller than the sum of its proper divisors (999085076672).

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

809238527968 is a wasteful number, since it uses less digits than its factorization.

809238527968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129300 (or 129292 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 67.

The spelling of 809238527968 in words is "eight hundred nine billion, two hundred thirty-eight million, five hundred twenty-seven thousand, nine hundred sixty-eight".