71116651841 has 2 divisors, whose sum is σ = 71116651842. Its totient is φ = 71116651840.

The previous prime is 71116651829. The next prime is 71116651847. The reversal of 71116651841 is 14815661117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49319082241 + 21797569600 = 222079^2 + 147640^2 .

It is a cyclic number.

It is not a de Polignac number, because 71116651841 - 2⁶ = 71116651777 is a prime.

It is not a weakly prime, because it can be changed into another prime (71116651847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35558325920 + 35558325921.

It is an arithmetic number, because the mean of its divisors is an integer number (35558325921).

Almost surely, 2^71116651841 is an apocalyptic number.

It is an amenable number.

71116651841 is a deficient number, since it is larger than the sum of its proper divisors (1).

71116651841 is an equidigital number, since it uses as much as digits as its factorization.

71116651841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 41.

The spelling of 71116651841 in words is "seventy-one billion, one hundred sixteen million, six hundred fifty-one thousand, eight hundred forty-one".