216640028714 has 8 divisors (see below), whose sum is σ = 328611279780. Its totient is φ = 107102935456.

The previous prime is 216640028609. The next prime is 216640028743. The reversal of 216640028714 is 417820046612.

It can be written as a sum of positive squares in 2 ways, for example, as 210731493025 + 5908535689 = 459055^2 + 76867^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608539229 + ... + 608539584.

Almost surely, 2^216640028714 is an apocalyptic number.

216640028714 is a deficient number, since it is larger than the sum of its proper divisors (111971251066).

216640028714 is a wasteful number, since it uses less digits than its factorization.

216640028714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217078904.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 216640028714 in words is "two hundred sixteen billion, six hundred forty million, twenty-eight thousand, seven hundred fourteen".