65216605664894 has 8 divisors (see below), whose sum is σ = 99063198478560. Its totient is φ = 32195539505376.

The previous prime is 65216605664869. The next prime is 65216605664933. The reversal of 65216605664894 is 49846650661256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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, 206381663339 + ... + 206381663654.

It is an arithmetic number, because the mean of its divisors is an integer number (12382899809820).

Almost surely, 2^{65216605664894} is an apocalyptic number.

65216605664894 is a deficient number, since it is larger than the sum of its proper divisors (33846592813666).

65216605664894 is a wasteful number, since it uses less digits than its factorization.

65216605664894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412763327074.

The product of its (nonzero) digits is 447897600, while the sum is 68.

The spelling of 65216605664894 in words is "sixty-five trillion, two hundred sixteen billion, six hundred five million, six hundred sixty-four thousand, eight hundred ninety-four".