31641723266969 has 2 divisors, whose sum is σ = 31641723266970. Its totient is φ = 31641723266968.

The previous prime is 31641723266941. The next prime is 31641723267017. The reversal of 31641723266969 is 96966232714613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16954341529225 + 14687381737744 = 4117565^2 + 3832412^2 .

It is an emirp because it is prime and its reverse (96966232714613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31641723266969 - 2²⁴ = 31641706489753 is a prime.

It is a super-2 number, since 2×31641723266969² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31641722266969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15820861633484 + 15820861633485.

It is an arithmetic number, because the mean of its divisors is an integer number (15820861633485).

Almost surely, 2^{31641723266969} is an apocalyptic number.

It is an amenable number.

31641723266969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31641723266969 is an equidigital number, since it uses as much as digits as its factorization.

31641723266969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105815808, while the sum is 65.

The spelling of 31641723266969 in words is "thirty-one trillion, six hundred forty-one billion, seven hundred twenty-three million, two hundred sixty-six thousand, nine hundred sixty-nine".