71327346161 has 2 divisors, whose sum is σ = 71327346162. Its totient is φ = 71327346160.

The previous prime is 71327346137. The next prime is 71327346163. The reversal of 71327346161 is 16164372317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71318907136 + 8439025 = 267056^2 + 2905^2 .

It is an emirp because it is prime and its reverse (16164372317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71327346161 is a prime.

It is a super-2 number, since 2×71327346161² (a number of 23 digits) contains 22 as substring.

Together with 71327346163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71327346163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35663673080 + 35663673081.

It is an arithmetic number, because the mean of its divisors is an integer number (35663673081).

Almost surely, 2^71327346161 is an apocalyptic number.

It is an amenable number.

71327346161 is a deficient number, since it is larger than the sum of its proper divisors (1).

71327346161 is an equidigital number, since it uses as much as digits as its factorization.

71327346161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The spelling of 71327346161 in words is "seventy-one billion, three hundred twenty-seven million, three hundred forty-six thousand, one hundred sixty-one".