216845873097 has 32 divisors (see below), whose sum is σ = 344902053888. Its totient is φ = 118488824256.

The previous prime is 216845873093. The next prime is 216845873113. The reversal of 216845873097 is 790378548612.

It is not a de Polignac number, because 216845873097 - 2² = 216845873093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216845873097.

It is not an unprimeable number, because it can be changed into a prime (216845873093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1582708 + ... + 1714250.

It is an arithmetic number, because the mean of its divisors is an integer number (10778189184).

It is a 1-persistent number, because it is pandigital, but 2⋅216845873097 = 433691746194 is not.

Almost surely, 2^216845873097 is an apocalyptic number.

It is an amenable number.

216845873097 is a deficient number, since it is larger than the sum of its proper divisors (128056180791).

216845873097 is a wasteful number, since it uses less digits than its factorization.

216845873097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134989.

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 216845873097 in words is "two hundred sixteen billion, eight hundred forty-five million, eight hundred seventy-three thousand, ninety-seven".