2170216853389 has 4 divisors (see below), whose sum is σ = 2337156611356. Its totient is φ = 2003277095424.

The previous prime is 2170216853359. The next prime is 2170216853417. The reversal of 2170216853389 is 9833586120712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178703189289 + 1991513664100 = 422733^2 + 1411210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2170216853389 - 2⁷ = 2170216853261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2170216853309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83469878964 + ... + 83469878989.

It is an arithmetic number, because the mean of its divisors is an integer number (584289152839).

Almost surely, 2^{2170216853389} is an apocalyptic number.

It is an amenable number.

2170216853389 is a deficient number, since it is larger than the sum of its proper divisors (166939757967).

2170216853389 is a wasteful number, since it uses less digits than its factorization.

2170216853389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166939757966.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 2170216853389 in words is "two trillion, one hundred seventy billion, two hundred sixteen million, eight hundred fifty-three thousand, three hundred eighty-nine".