8399559656 has 16 divisors (see below), whose sum is σ = 15869399040. Its totient is φ = 4167719920.

The previous prime is 8399559629. The next prime is 8399559793. The reversal of 8399559656 is 6569559938.

It is a junction number, because it is equal to n+sod(n) for n = 8399559592 and 8399559601.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4006376 + ... + 4008471.

It is an arithmetic number, because the mean of its divisors is an integer number (991837440).

Almost surely, 2^8399559656 is an apocalyptic number.

It is an amenable number.

8399559656 is a deficient number, since it is larger than the sum of its proper divisors (7469839384).

8399559656 is a wasteful number, since it uses less digits than its factorization.

8399559656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8014984 (or 8014980 counting only the distinct ones).

The product of its digits is 78732000, while the sum is 65.

The square root of 8399559656 is about 91649.1115941666. Note that the first 3 decimals coincide. The cubic root of 8399559656 is about 2032.7571920537.

The spelling of 8399559656 in words is "eight billion, three hundred ninety-nine million, five hundred fifty-nine thousand, six hundred fifty-six".