71205039361 has 2 divisors, whose sum is σ = 71205039362. Its totient is φ = 71205039360.

The previous prime is 71205039319. The next prime is 71205039457. The reversal of 71205039361 is 16393050217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66335093136 + 4869946225 = 257556^2 + 69785^2 .

It is a cyclic number.

It is not a de Polignac number, because 71205039361 - 2¹³ = 71205031169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71205039361.

It is not a weakly prime, because it can be changed into another prime (71205039161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35602519680 + 35602519681.

It is an arithmetic number, because the mean of its divisors is an integer number (35602519681).

Almost surely, 2^71205039361 is an apocalyptic number.

It is an amenable number.

71205039361 is a deficient number, since it is larger than the sum of its proper divisors (1).

71205039361 is an equidigital number, since it uses as much as digits as its factorization.

71205039361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

Adding to 71205039361 its reverse (16393050217), we get a palindrome (87598089578).

The spelling of 71205039361 in words is "seventy-one billion, two hundred five million, thirty-nine thousand, three hundred sixty-one".