71201039549 has 2 divisors, whose sum is σ = 71201039550. Its totient is φ = 71201039548.

The previous prime is 71201039521. The next prime is 71201039551. The reversal of 71201039549 is 94593010217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45691200025 + 25509839524 = 213755^2 + 159718^2 .

It is an emirp because it is prime and its reverse (94593010217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71201039549 - 2²⁰ = 71199990973 is a prime.

Together with 71201039551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71201039449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35600519774 + 35600519775.

It is an arithmetic number, because the mean of its divisors is an integer number (35600519775).

Almost surely, 2^71201039549 is an apocalyptic number.

It is an amenable number.

71201039549 is a deficient number, since it is larger than the sum of its proper divisors (1).

71201039549 is an equidigital number, since it uses as much as digits as its factorization.

71201039549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 71201039549 in words is "seventy-one billion, two hundred one million, thirty-nine thousand, five hundred forty-nine".