71275832181 has 12 divisors (see below), whose sum is σ = 103381177900. Its totient is φ = 47320053120.

The previous prime is 71275832167. The next prime is 71275832207. The reversal of 71275832181 is 18123857217.

It can be written as a sum of positive squares in 2 ways, for example, as 62933749956 + 8342082225 = 250866^2 + 91335^2 .

It is not a de Polignac number, because 71275832181 - 2¹⁰ = 71275831157 is a prime.

It is a super-2 number, since 2×71275832181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71275832141) 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 in 11 ways as a sum of consecutive naturals, for example, 16428406 + ... + 16432743.

Almost surely, 2^71275832181 is an apocalyptic number.

It is an amenable number.

71275832181 is a deficient number, since it is larger than the sum of its proper divisors (32105345719).

71275832181 is a wasteful number, since it uses less digits than its factorization.

71275832181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32861396 (or 32861393 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The spelling of 71275832181 in words is "seventy-one billion, two hundred seventy-five million, eight hundred thirty-two thousand, one hundred eighty-one".