329856806217 has 4 divisors (see below), whose sum is σ = 439809074960. Its totient is φ = 219904537476.

The previous prime is 329856806137. The next prime is 329856806219. The reversal of 329856806217 is 712608658923.

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 not a de Polignac number, because 329856806217 - 2³⁸ = 54978899273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (329856806219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54976134367 + ... + 54976134372.

It is an arithmetic number, because the mean of its divisors is an integer number (109952268740).

Almost surely, 2^329856806217 is an apocalyptic number.

It is an amenable number.

329856806217 is a deficient number, since it is larger than the sum of its proper divisors (109952268743).

329856806217 is a wasteful number, since it uses less digits than its factorization.

329856806217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109952268742.

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 329856806217 in words is "three hundred twenty-nine billion, eight hundred fifty-six million, eight hundred six thousand, two hundred seventeen".