217066745089 has 4 divisors (see below), whose sum is σ = 228491310640. Its totient is φ = 205642179540.

The previous prime is 217066745059. The next prime is 217066745107. The reversal of 217066745089 is 980547660712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 217066745089 - 2⁵ = 217066745057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217066745009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5712282747 + ... + 5712282784.

It is an arithmetic number, because the mean of its divisors is an integer number (57122827660).

Almost surely, 2^217066745089 is an apocalyptic number.

It is an amenable number.

217066745089 is a deficient number, since it is larger than the sum of its proper divisors (11424565551).

217066745089 is a wasteful number, since it uses less digits than its factorization.

217066745089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11424565550.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 217066745089 in words is "two hundred seventeen billion, sixty-six million, seven hundred forty-five thousand, eighty-nine".