72685786641841 has 2 divisors, whose sum is σ = 72685786641842. Its totient is φ = 72685786641840.

The previous prime is 72685786641803. The next prime is 72685786641971. The reversal of 72685786641841 is 14814668758627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72233255970225 + 452530671616 = 8499015^2 + 672704^2 .

It is a cyclic number.

It is not a de Polignac number, because 72685786641841 - 2²³ = 72685778253233 is a prime.

It is not a weakly prime, because it can be changed into another prime (72685786341841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36342893320920 + 36342893320921.

It is an arithmetic number, because the mean of its divisors is an integer number (36342893320921).

Almost surely, 2^{72685786641841} is an apocalyptic number.

It is an amenable number.

72685786641841 is a deficient number, since it is larger than the sum of its proper divisors (1).

72685786641841 is an equidigital number, since it uses as much as digits as its factorization.

72685786641841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 867041280, while the sum is 73.

The spelling of 72685786641841 in words is "seventy-two trillion, six hundred eighty-five billion, seven hundred eighty-six million, six hundred forty-one thousand, eight hundred forty-one".