216576067349 has 2 divisors, whose sum is σ = 216576067350. Its totient is φ = 216576067348.

The previous prime is 216576067327. The next prime is 216576067381. The reversal of 216576067349 is 943760675612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202765587025 + 13810480324 = 450295^2 + 117518^2 .

It is a cyclic number.

It is not a de Polignac number, because 216576067349 - 2⁸ = 216576067093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216576067294 and 216576067303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216576067649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108288033674 + 108288033675.

It is an arithmetic number, because the mean of its divisors is an integer number (108288033675).

Almost surely, 2^216576067349 is an apocalyptic number.

It is an amenable number.

216576067349 is a deficient number, since it is larger than the sum of its proper divisors (1).

216576067349 is an equidigital number, since it uses as much as digits as its factorization.

216576067349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 216576067349 in words is "two hundred sixteen billion, five hundred seventy-six million, sixty-seven thousand, three hundred forty-nine".