71343837511 has 2 divisors, whose sum is σ = 71343837512. Its totient is φ = 71343837510.

The previous prime is 71343837443. The next prime is 71343837533. The reversal of 71343837511 is 11573834317.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71343837511 - 2⁹ = 71343836999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71343837311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35671918755 + 35671918756.

It is an arithmetic number, because the mean of its divisors is an integer number (35671918756).

Almost surely, 2^71343837511 is an apocalyptic number.

71343837511 is a deficient number, since it is larger than the sum of its proper divisors (1).

71343837511 is an equidigital number, since it uses as much as digits as its factorization.

71343837511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The spelling of 71343837511 in words is "seventy-one billion, three hundred forty-three million, eight hundred thirty-seven thousand, five hundred eleven".