71461338181 has 2 divisors, whose sum is σ = 71461338182. Its totient is φ = 71461338180.

The previous prime is 71461338173. The next prime is 71461338211. The reversal of 71461338181 is 18183316417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66695645025 + 4765693156 = 258255^2 + 69034^2 .

It is a cyclic number.

It is not a de Polignac number, because 71461338181 - 2³ = 71461338173 is a prime.

It is a super-2 number, since 2×71461338181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71461332181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35730669090 + 35730669091.

It is an arithmetic number, because the mean of its divisors is an integer number (35730669091).

Almost surely, 2^71461338181 is an apocalyptic number.

It is an amenable number.

71461338181 is a deficient number, since it is larger than the sum of its proper divisors (1).

71461338181 is an equidigital number, since it uses as much as digits as its factorization.

71461338181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The spelling of 71461338181 in words is "seventy-one billion, four hundred sixty-one million, three hundred thirty-eight thousand, one hundred eighty-one".