71125897727447 has 2 divisors, whose sum is σ = 71125897727448. Its totient is φ = 71125897727446.

The previous prime is 71125897727411. The next prime is 71125897727477. The reversal of 71125897727447 is 74472779852117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71125897727447 - 2⁸ = 71125897727191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71125897727477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35562948863723 + 35562948863724.

It is an arithmetic number, because the mean of its divisors is an integer number (35562948863724).

Almost surely, 2^{71125897727447} is an apocalyptic number.

71125897727447 is a deficient number, since it is larger than the sum of its proper divisors (1).

71125897727447 is an equidigital number, since it uses as much as digits as its factorization.

71125897727447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387233280, while the sum is 71.

The spelling of 71125897727447 in words is "seventy-one trillion, one hundred twenty-five billion, eight hundred ninety-seven million, seven hundred twenty-seven thousand, four hundred forty-seven".