217707734413 has 8 divisors (see below), whose sum is σ = 234515704248. Its totient is φ = 200908510464.

The previous prime is 217707734411. The next prime is 217707734429. The reversal of 217707734413 is 314437707712.

It can be written as a sum of positive squares in 4 ways, for example, as 11530893924 + 206176840489 = 107382^2 + 454067^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 217707734413 - 2¹ = 217707734411 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 (217707734411) 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 7 ways as a sum of consecutive naturals, for example, 2134720 + ... + 2234377.

It is an arithmetic number, because the mean of its divisors is an integer number (29314463031).

Almost surely, 2^217707734413 is an apocalyptic number.

It is an amenable number.

217707734413 is a deficient number, since it is larger than the sum of its proper divisors (16807969835).

217707734413 is a wasteful number, since it uses less digits than its factorization.

217707734413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372943.

The product of its (nonzero) digits is 691488, while the sum is 46.

The spelling of 217707734413 in words is "two hundred seventeen billion, seven hundred seven million, seven hundred thirty-four thousand, four hundred thirteen".