71349353081 has 2 divisors, whose sum is σ = 71349353082. Its totient is φ = 71349353080.

The previous prime is 71349353059. The next prime is 71349353093. The reversal of 71349353081 is 18035394317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40568405056 + 30780948025 = 201416^2 + 175445^2 .

It is a cyclic number.

It is not a de Polignac number, because 71349353081 - 2¹⁴ = 71349336697 is a prime.

It is a super-2 number, since 2×71349353081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71349353011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35674676540 + 35674676541.

It is an arithmetic number, because the mean of its divisors is an integer number (35674676541).

Almost surely, 2^71349353081 is an apocalyptic number.

It is an amenable number.

71349353081 is a deficient number, since it is larger than the sum of its proper divisors (1).

71349353081 is an equidigital number, since it uses as much as digits as its factorization.

71349353081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 71349353081 in words is "seventy-one billion, three hundred forty-nine million, three hundred fifty-three thousand, eighty-one".