816808462688 has 72 divisors (see below), whose sum is σ = 1637116903800. Its totient is φ = 401161333760.

The previous prime is 816808462681. The next prime is 816808462703. The reversal of 816808462688 is 886264808618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816808462681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201728888 + ... + 201732936.

It is an arithmetic number, because the mean of its divisors is an integer number (22737734775).

Almost surely, 2^816808462688 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 816808462688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (818558451900).

816808462688 is an abundant number, since it is smaller than the sum of its proper divisors (820308441112).

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

816808462688 is a wasteful number, since it uses less digits than its factorization.

816808462688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5988 (or 5921 counting only the distinct ones).

The product of its (nonzero) digits is 56623104, while the sum is 65.

The spelling of 816808462688 in words is "eight hundred sixteen billion, eight hundred eight million, four hundred sixty-two thousand, six hundred eighty-eight".