71508345439 has 2 divisors, whose sum is σ = 71508345440. Its totient is φ = 71508345438.

The previous prime is 71508345353. The next prime is 71508345449. The reversal of 71508345439 is 93454380517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71508345439 - 2¹³ = 71508337247 is a prime.

It is a super-2 number, since 2×71508345439² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71508345392 and 71508345401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71508345449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35754172719 + 35754172720.

It is an arithmetic number, because the mean of its divisors is an integer number (35754172720).

Almost surely, 2^71508345439 is an apocalyptic number.

71508345439 is a deficient number, since it is larger than the sum of its proper divisors (1).

71508345439 is an equidigital number, since it uses as much as digits as its factorization.

71508345439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 71508345439 in words is "seventy-one billion, five hundred eight million, three hundred forty-five thousand, four hundred thirty-nine".