217381044463 has 8 divisors (see below), whose sum is σ = 237986886096. Its totient is φ = 196915857600.

The previous prime is 217381044451. The next prime is 217381044493. The reversal of 217381044463 is 364440183712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 217381044463 - 2³³ = 208791109871 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 (217381044443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35160456 + ... + 35166637.

It is an arithmetic number, because the mean of its divisors is an integer number (29748360762).

Almost surely, 2^217381044463 is an apocalyptic number.

217381044463 is a deficient number, since it is larger than the sum of its proper divisors (20605841633).

217381044463 is a wasteful number, since it uses less digits than its factorization.

217381044463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70327385.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 217381044463 in words is "two hundred seventeen billion, three hundred eighty-one million, forty-four thousand, four hundred sixty-three".