65217216650 has 12 divisors (see below), whose sum is σ = 121304023062. Its totient is φ = 26086886640.

The previous prime is 65217216607. The next prime is 65217216677. The reversal of 65217216650 is 5661271256.

It can be written as a sum of positive squares in 3 ways, for example, as 34166195281 + 31051021369 = 184841^2 + 176213^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65217216598 and 65217216607.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 652172117 + ... + 652172216.

Almost surely, 2^65217216650 is an apocalyptic number.

65217216650 is a deficient number, since it is larger than the sum of its proper divisors (56086806412).

65217216650 is a wasteful number, since it uses less digits than its factorization.

65217216650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304344345 (or 1304344340 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 65217216650 in words is "sixty-five billion, two hundred seventeen million, two hundred sixteen thousand, six hundred fifty".