216180849866351 has 2 divisors, whose sum is σ = 216180849866352. Its totient is φ = 216180849866350.

The previous prime is 216180849866347. The next prime is 216180849866413. The reversal of 216180849866351 is 153668948081612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216180849866351 - 2² = 216180849866347 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216180849863351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108090424933175 + 108090424933176.

It is an arithmetic number, because the mean of its divisors is an integer number (108090424933176).

Almost surely, 2^{216180849866351} is an apocalyptic number.

216180849866351 is a deficient number, since it is larger than the sum of its proper divisors (1).

216180849866351 is an equidigital number, since it uses as much as digits as its factorization.

216180849866351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119439360, while the sum is 68.

The spelling of 216180849866351 in words is "two hundred sixteen trillion, one hundred eighty billion, eight hundred forty-nine million, eight hundred sixty-six thousand, three hundred fifty-one".