71020075817 has 2 divisors, whose sum is σ = 71020075818. Its totient is φ = 71020075816.

The previous prime is 71020075801. The next prime is 71020075943. The reversal of 71020075817 is 71857002017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38925711616 + 32094364201 = 197296^2 + 179149^2 .

It is a cyclic number.

It is not a de Polignac number, because 71020075817 - 2⁴ = 71020075801 is a prime.

It is not a weakly prime, because it can be changed into another prime (71020075117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35510037908 + 35510037909.

It is an arithmetic number, because the mean of its divisors is an integer number (35510037909).

Almost surely, 2^71020075817 is an apocalyptic number.

It is an amenable number.

71020075817 is a deficient number, since it is larger than the sum of its proper divisors (1).

71020075817 is an equidigital number, since it uses as much as digits as its factorization.

71020075817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27440, while the sum is 38.

The spelling of 71020075817 in words is "seventy-one billion, twenty million, seventy-five thousand, eight hundred seventeen".