216065371205 has 8 divisors (see below), whose sum is σ = 259283720952. Its totient is φ = 172848779968.

The previous prime is 216065371177. The next prime is 216065371231. The reversal of 216065371205 is 502173560612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11202317281 + 204863053924 = 105841^2 + 452618^2 .

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 216065371205 - 2¹⁴ = 216065354821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152234 + ... + 674763.

It is an arithmetic number, because the mean of its divisors is an integer number (32410465119).

Almost surely, 2^216065371205 is an apocalyptic number.

It is an amenable number.

216065371205 is a deficient number, since it is larger than the sum of its proper divisors (43218349747).

216065371205 is an equidigital number, since it uses as much as digits as its factorization.

216065371205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879255.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 216065371205 in words is "two hundred sixteen billion, sixty-five million, three hundred seventy-one thousand, two hundred five".