8065387856 has 20 divisors (see below), whose sum is σ = 15770056500. Its totient is φ = 3995695872.

The previous prime is 8065387849. The next prime is 8065387903. The reversal of 8065387856 is 6587835608.

It can be written as a sum of positive squares in 2 ways, for example, as 3069160000 + 4996227856 = 55400^2 + 70684^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2310581 + ... + 2314068.

It is an arithmetic number, because the mean of its divisors is an integer number (788502825).

Almost surely, 2^8065387856 is an apocalyptic number.

It is an amenable number.

8065387856 is a deficient number, since it is larger than the sum of its proper divisors (7704668644).

8065387856 is a wasteful number, since it uses less digits than its factorization.

8065387856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4624766 (or 4624760 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 56.

The square root of 8065387856 is about 89807.5044525790. The cubic root of 8065387856 is about 2005.4342093116.

The spelling of 8065387856 in words is "eight billion, sixty-five million, three hundred eighty-seven thousand, eight hundred fifty-six".