869405586731081 has 2 divisors, whose sum is σ = 869405586731082. Its totient is φ = 869405586731080.

The previous prime is 869405586731057. The next prime is 869405586731153. The reversal of 869405586731081 is 180137685504968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745667661431056 + 123737925300025 = 27306916^2 + 11123755^2 .

It is a cyclic number.

It is not a de Polignac number, because 869405586731081 - 2³⁸ = 869130708824137 is a prime.

It is a super-2 number, since 2×869405586731081² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 869405586730996 and 869405586731014.

It is not a weakly prime, because it can be changed into another prime (869405586737081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434702793365540 + 434702793365541.

It is an arithmetic number, because the mean of its divisors is an integer number (434702793365541).

Almost surely, 2^{869405586731081} is an apocalyptic number.

It is an amenable number.

869405586731081 is a deficient number, since it is larger than the sum of its proper divisors (1).

869405586731081 is an equidigital number, since it uses as much as digits as its factorization.

869405586731081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 348364800, while the sum is 71.

The spelling of 869405586731081 in words is "eight hundred sixty-nine trillion, four hundred five billion, five hundred eighty-six million, seven hundred thirty-one thousand, eighty-one".