71657028071 has 2 divisors, whose sum is σ = 71657028072. Its totient is φ = 71657028070.

The previous prime is 71657027989. The next prime is 71657028077. The reversal of 71657028071 is 17082075617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71657028071 - 2²⁶ = 71589919207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71657028077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35828514035 + 35828514036.

It is an arithmetic number, because the mean of its divisors is an integer number (35828514036).

Almost surely, 2^71657028071 is an apocalyptic number.

71657028071 is a deficient number, since it is larger than the sum of its proper divisors (1).

71657028071 is an equidigital number, since it uses as much as digits as its factorization.

71657028071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164640, while the sum is 44.

The spelling of 71657028071 in words is "seventy-one billion, six hundred fifty-seven million, twenty-eight thousand, seventy-one".