216265273361 has 2 divisors, whose sum is σ = 216265273362. Its totient is φ = 216265273360.

The previous prime is 216265273331. The next prime is 216265273417. The reversal of 216265273361 is 163372562612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161378154961 + 54887118400 = 401719^2 + 234280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216265273361 is a prime.

It is not a weakly prime, because it can be changed into another prime (216265273321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108132636680 + 108132636681.

It is an arithmetic number, because the mean of its divisors is an integer number (108132636681).

Almost surely, 2^216265273361 is an apocalyptic number.

It is an amenable number.

216265273361 is a deficient number, since it is larger than the sum of its proper divisors (1).

216265273361 is an equidigital number, since it uses as much as digits as its factorization.

216265273361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 44.

The spelling of 216265273361 in words is "two hundred sixteen billion, two hundred sixty-five million, two hundred seventy-three thousand, three hundred sixty-one".