65638413868 has 6 divisors (see below), whose sum is σ = 114867224276. Its totient is φ = 32819206932.

The previous prime is 65638413857. The next prime is 65638413877. The reversal of 65638413868 is 86831483656.

65638413868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8204801730 + ... + 8204801737.

Almost surely, 2^65638413868 is an apocalyptic number.

It is an amenable number.

65638413868 is a deficient number, since it is larger than the sum of its proper divisors (49228810408).

65638413868 is a wasteful number, since it uses less digits than its factorization.

65638413868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16409603471 (or 16409603469 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 58.

The spelling of 65638413868 in words is "sixty-five billion, six hundred thirty-eight million, four hundred thirteen thousand, eight hundred sixty-eight".