216978683027 has 2 divisors, whose sum is σ = 216978683028. Its totient is φ = 216978683026.

The previous prime is 216978683003. The next prime is 216978683029. The reversal of 216978683027 is 720386879612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216978683027 - 2¹⁶ = 216978617491 is a prime.

Together with 216978683029, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216978683029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108489341513 + 108489341514.

It is an arithmetic number, because the mean of its divisors is an integer number (108489341514).

Almost surely, 2^216978683027 is an apocalyptic number.

216978683027 is a deficient number, since it is larger than the sum of its proper divisors (1).

216978683027 is an equidigital number, since it uses as much as digits as its factorization.

216978683027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 216978683027 in words is "two hundred sixteen billion, nine hundred seventy-eight million, six hundred eighty-three thousand, twenty-seven".