517668216 has 64 divisors (see below), whose sum is σ = 1399900320. Its totient is φ = 158576640.

The previous prime is 517668211. The next prime is 517668227. The reversal of 517668216 is 612866715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517668211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69136 + ... + 76256.

Almost surely, 2^517668216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 517668216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699950160).

517668216 is an abundant number, since it is smaller than the sum of its proper divisors (882232104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

517668216 is a wasteful number, since it uses less digits than its factorization.

517668216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7376 (or 7372 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 517668216 is about 22752.3233099391. The cubic root of 517668216 is about 802.9413680220.

The spelling of 517668216 in words is "five hundred seventeen million, six hundred sixty-eight thousand, two hundred sixteen".