816817697768 has 16 divisors (see below), whose sum is σ = 1531619304000. Its totient is φ = 408385883376.

The previous prime is 816817697767. The next prime is 816817697771. The reversal of 816817697768 is 867796718618.

It is a junction number, because it is equal to n+sod(n) for n = 816817697695 and 816817697704.

It is not an unprimeable number, because it can be changed into a prime (816817697767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2719058 + ... + 3004481.

It is an arithmetic number, because the mean of its divisors is an integer number (95726206500).

Almost surely, 2^816817697768 is an apocalyptic number.

It is an amenable number.

816817697768 is a deficient number, since it is larger than the sum of its proper divisors (714801606232).

816817697768 is a wasteful number, since it uses less digits than its factorization.

816817697768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741384 (or 5741380 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 74.

The spelling of 816817697768 in words is "eight hundred sixteen billion, eight hundred seventeen million, six hundred ninety-seven thousand, seven hundred sixty-eight".