216676322773961 has 2 divisors, whose sum is σ = 216676322773962. Its totient is φ = 216676322773960.

The previous prime is 216676322773949. The next prime is 216676322773987. The reversal of 216676322773961 is 169377223676612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204090367440400 + 12585955333561 = 14286020^2 + 3547669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216676322773961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216676322773891 and 216676322773900.

It is not a weakly prime, because it can be changed into another prime (216676322773931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108338161386980 + 108338161386981.

It is an arithmetic number, because the mean of its divisors is an integer number (108338161386981).

Almost surely, 2^{216676322773961} is an apocalyptic number.

It is an amenable number.

216676322773961 is a deficient number, since it is larger than the sum of its proper divisors (1).

216676322773961 is an equidigital number, since it uses as much as digits as its factorization.

216676322773961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288054144, while the sum is 68.

The spelling of 216676322773961 in words is "two hundred sixteen trillion, six hundred seventy-six billion, three hundred twenty-two million, seven hundred seventy-three thousand, nine hundred sixty-one".