71442841181 has 2 divisors, whose sum is σ = 71442841182. Its totient is φ = 71442841180.

The previous prime is 71442841177. The next prime is 71442841231. The reversal of 71442841181 is 18114824417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70158765625 + 1284075556 = 264875^2 + 35834^2 .

It is a cyclic number.

It is not a de Polignac number, because 71442841181 - 2² = 71442841177 is a prime.

It is a super-2 number, since 2×71442841181² (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 (71442840181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35721420590 + 35721420591.

It is an arithmetic number, because the mean of its divisors is an integer number (35721420591).

Almost surely, 2^71442841181 is an apocalyptic number.

It is an amenable number.

71442841181 is a deficient number, since it is larger than the sum of its proper divisors (1).

71442841181 is an equidigital number, since it uses as much as digits as its factorization.

71442841181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 41.

The spelling of 71442841181 in words is "seventy-one billion, four hundred forty-two million, eight hundred forty-one thousand, one hundred eighty-one".