71071021627789 has 2 divisors, whose sum is σ = 71071021627790. Its totient is φ = 71071021627788.

The previous prime is 71071021627733. The next prime is 71071021627831. The reversal of 71071021627789 is 98772612017017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69756655682025 + 1314365945764 = 8352045^2 + 1146458^2 .

It is a cyclic number.

It is not a de Polignac number, because 71071021627789 - 2¹³ = 71071021619597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71071021627189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35535510813894 + 35535510813895.

It is an arithmetic number, because the mean of its divisors is an integer number (35535510813895).

Almost surely, 2^{71071021627789} is an apocalyptic number.

It is an amenable number.

71071021627789 is a deficient number, since it is larger than the sum of its proper divisors (1).

71071021627789 is an equidigital number, since it uses as much as digits as its factorization.

71071021627789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4148928, while the sum is 58.

The spelling of 71071021627789 in words is "seventy-one trillion, seventy-one billion, twenty-one million, six hundred twenty-seven thousand, seven hundred eighty-nine".