216765748065 has 16 divisors (see below), whose sum is σ = 355284349056. Its totient is φ = 112788681600.

The previous prime is 216765748061. The next prime is 216765748099. The reversal of 216765748065 is 560847567612.

It is not a de Polignac number, because 216765748065 - 2² = 216765748061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216765747996 and 216765748014.

It is not an unprimeable number, because it can be changed into a prime (216765748061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176231701 + ... + 176232930.

It is an arithmetic number, because the mean of its divisors is an integer number (22205271816).

Almost surely, 2^216765748065 is an apocalyptic number.

It is an amenable number.

216765748065 is a deficient number, since it is larger than the sum of its proper divisors (138518600991).

216765748065 is a wasteful number, since it uses less digits than its factorization.

216765748065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352464680.

The product of its (nonzero) digits is 16934400, while the sum is 57.

The spelling of 216765748065 in words is "two hundred sixteen billion, seven hundred sixty-five million, seven hundred forty-eight thousand, sixty-five".