217017064906 has 16 divisors (see below), whose sum is σ = 331682770944. Its totient is φ = 106456328784.

The previous prime is 217017064897. The next prime is 217017064933. The reversal of 217017064906 is 609460710712.

217017064906 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 7 ways as a sum of consecutive naturals, for example, 3647311 + ... + 3706333.

It is an arithmetic number, because the mean of its divisors is an integer number (20730173184).

Almost surely, 2^217017064906 is an apocalyptic number.

217017064906 is a deficient number, since it is larger than the sum of its proper divisors (114665706038).

217017064906 is a wasteful number, since it uses less digits than its factorization.

217017064906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93765.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 217017064906 in words is "two hundred seventeen billion, seventeen million, sixty-four thousand, nine hundred six".