216644364358 has 4 divisors (see below), whose sum is σ = 324966546540. Its totient is φ = 108322182178.

The previous prime is 216644364353. The next prime is 216644364371. The reversal of 216644364358 is 853463446612.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×216644364358³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216644364353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54161091088 + ... + 54161091091.

It is an arithmetic number, because the mean of its divisors is an integer number (81241636635).

Almost surely, 2^216644364358 is an apocalyptic number.

216644364358 is a deficient number, since it is larger than the sum of its proper divisors (108322182182).

216644364358 is a wasteful number, since it uses less digits than its factorization.

216644364358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108322182181.

The product of its digits is 9953280, while the sum is 52.

The spelling of 216644364358 in words is "two hundred sixteen billion, six hundred forty-four million, three hundred sixty-four thousand, three hundred fifty-eight".