216473886721 has 8 divisors (see below), whose sum is σ = 232166632320. Its totient is φ = 201211079472.

The previous prime is 216473886667. The next prime is 216473886743. The reversal of 216473886721 is 127688374612.

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

It is a cyclic number.

It is not a de Polignac number, because 216473886721 - 2⁷ = 216473886593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216473886751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107483545 + ... + 107485558.

It is an arithmetic number, because the mean of its divisors is an integer number (29020829040).

Almost surely, 2^216473886721 is an apocalyptic number.

It is an amenable number.

216473886721 is a deficient number, since it is larger than the sum of its proper divisors (15692745599).

216473886721 is a wasteful number, since it uses less digits than its factorization.

216473886721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214969175.

The product of its digits is 5419008, while the sum is 55.

The spelling of 216473886721 in words is "two hundred sixteen billion, four hundred seventy-three million, eight hundred eighty-six thousand, seven hundred twenty-one".