216972848665 has 64 divisors (see below), whose sum is σ = 289696435200. Its totient is φ = 155308769280.

The previous prime is 216972848641. The next prime is 216972848669. The reversal of 216972848665 is 566848279612.

It is not a de Polignac number, because 216972848665 - 2⁷ = 216972848537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216972848597 and 216972848606.

It is not an unprimeable number, because it can be changed into a prime (216972848669) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25228036 + ... + 25236634.

It is an arithmetic number, because the mean of its divisors is an integer number (4526506800).

Almost surely, 2^216972848665 is an apocalyptic number.

It is an amenable number.

216972848665 is a deficient number, since it is larger than the sum of its proper divisors (72723586535).

216972848665 is a wasteful number, since it uses less digits than its factorization.

216972848665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8842.

The product of its digits is 69672960, while the sum is 64.

The spelling of 216972848665 in words is "two hundred sixteen billion, nine hundred seventy-two million, eight hundred forty-eight thousand, six hundred sixty-five".