71141211961 has 2 divisors, whose sum is σ = 71141211962. Its totient is φ = 71141211960.

The previous prime is 71141211943. The next prime is 71141212091. The reversal of 71141211961 is 16911214117.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70158765625 + 982446336 = 264875^2 + 31344^2 .

It is a cyclic number.

It is not a de Polignac number, because 71141211961 - 2¹⁷ = 71141080889 is a prime.

It is a super-2 number, since 2×71141211961² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71141211461) 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, 35570605980 + 35570605981.

It is an arithmetic number, because the mean of its divisors is an integer number (35570605981).

Almost surely, 2^71141211961 is an apocalyptic number.

It is an amenable number.

71141211961 is a deficient number, since it is larger than the sum of its proper divisors (1).

71141211961 is an equidigital number, since it uses as much as digits as its factorization.

71141211961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 34.

The spelling of 71141211961 in words is "seventy-one billion, one hundred forty-one million, two hundred eleven thousand, nine hundred sixty-one".