217764528928 has 24 divisors (see below), whose sum is σ = 428901888240. Its totient is φ = 108837065280.

The previous prime is 217764528901. The next prime is 217764528983. The reversal of 217764528928 is 829825467712.

It is a happy number.

217764528928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1334118 + ... + 1488421.

It is an arithmetic number, because the mean of its divisors is an integer number (17870912010).

Almost surely, 2^217764528928 is an apocalyptic number.

It is an amenable number.

217764528928 is a deficient number, since it is larger than the sum of its proper divisors (211137359312).

217764528928 is a wasteful number, since it uses less digits than its factorization.

217764528928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824960 (or 2824952 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 61.

The spelling of 217764528928 in words is "two hundred seventeen billion, seven hundred sixty-four million, five hundred twenty-eight thousand, nine hundred twenty-eight".