216182057564818 has 8 divisors (see below), whose sum is σ = 330391446467148. Its totient is φ = 106051575409104.

The previous prime is 216182057564747. The next prime is 216182057564819. The reversal of 216182057564818 is 818465750281612.

It can be written as a sum of positive squares in 2 ways, for example, as 212659893276769 + 3522164288049 = 14582863^2 + 1876743^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 216182057564818.

It is not an unprimeable number, because it can be changed into a prime (216182057564819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019726686521 + ... + 1019726686732.

Almost surely, 2^{216182057564818} is an apocalyptic number.

216182057564818 is a deficient number, since it is larger than the sum of its proper divisors (114209388902330).

216182057564818 is a wasteful number, since it uses less digits than its factorization.

216182057564818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039453373308.

The product of its (nonzero) digits is 51609600, while the sum is 64.

The spelling of 216182057564818 in words is "two hundred sixteen trillion, one hundred eighty-two billion, fifty-seven million, five hundred sixty-four thousand, eight hundred eighteen".