216055666898 has 4 divisors (see below), whose sum is σ = 324083500350. Its totient is φ = 108027833448.

The previous prime is 216055666859. The next prime is 216055666991. The reversal of 216055666898 is 898666550612.

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

It can be written as a sum of positive squares in only one way, i.e., 118441287409 + 97614379489 = 344153^2 + 312433^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216055666898.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54013916723 + ... + 54013916726.

Almost surely, 2^216055666898 is an apocalyptic number.

216055666898 is a deficient number, since it is larger than the sum of its proper divisors (108027833452).

216055666898 is a wasteful number, since it uses less digits than its factorization.

216055666898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108027833451.

The product of its (nonzero) digits is 37324800, while the sum is 62.

The spelling of 216055666898 in words is "two hundred sixteen billion, fifty-five million, six hundred sixty-six thousand, eight hundred ninety-eight".