216423068663 has 4 divisors (see below), whose sum is σ = 216424000800. Its totient is φ = 216422136528.

The previous prime is 216423068647. The next prime is 216423068747. The reversal of 216423068663 is 366860324612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 216423068663 - 2⁴ = 216423068647 is a prime.

It is a super-2 number, since 2×216423068663² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216425068663) 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, 190706 + ... + 684992.

It is an arithmetic number, because the mean of its divisors is an integer number (54106000200).

Almost surely, 2^216423068663 is an apocalyptic number.

216423068663 is a deficient number, since it is larger than the sum of its proper divisors (932137).

216423068663 is an equidigital number, since it uses as much as digits as its factorization.

216423068663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932136.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 216423068663 in words is "two hundred sixteen billion, four hundred twenty-three million, sixty-eight thousand, six hundred sixty-three".