72163493132209 has 2 divisors, whose sum is σ = 72163493132210. Its totient is φ = 72163493132208.

The previous prime is 72163493132197. The next prime is 72163493132279. The reversal of 72163493132209 is 90223139436127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71338716750625 + 824776381584 = 8446225^2 + 908172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72163493132209 is a prime.

It is not a weakly prime, because it can be changed into another prime (72163493132279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36081746566104 + 36081746566105.

It is an arithmetic number, because the mean of its divisors is an integer number (36081746566105).

Almost surely, 2^{72163493132209} is an apocalyptic number.

It is an amenable number.

72163493132209 is a deficient number, since it is larger than the sum of its proper divisors (1).

72163493132209 is an equidigital number, since it uses as much as digits as its factorization.

72163493132209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 52.

The spelling of 72163493132209 in words is "seventy-two trillion, one hundred sixty-three billion, four hundred ninety-three million, one hundred thirty-two thousand, two hundred nine".