72163493132197 has 2 divisors, whose sum is σ = 72163493132198. Its totient is φ = 72163493132196.

The previous prime is 72163493132183. The next prime is 72163493132209. The reversal of 72163493132197 is 79123139436127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68001562645636 + 4161930486561 = 8246306^2 + 2040081^2 .

It is a cyclic number.

It is not a de Polignac number, because 72163493132197 - 2³¹ = 72161345648549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72163493132147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36081746566098 + 36081746566099.

It is an arithmetic number, because the mean of its divisors is an integer number (36081746566099).

Almost surely, 2^{72163493132197} is an apocalyptic number.

It is an amenable number.

72163493132197 is a deficient number, since it is larger than the sum of its proper divisors (1).

72163493132197 is an equidigital number, since it uses as much as digits as its factorization.

72163493132197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 58.

The spelling of 72163493132197 in words is "seventy-two trillion, one hundred sixty-three billion, four hundred ninety-three million, one hundred thirty-two thousand, one hundred ninety-seven".