71705516539 has 2 divisors, whose sum is σ = 71705516540. Its totient is φ = 71705516538.

The previous prime is 71705516501. The next prime is 71705516557. The reversal of 71705516539 is 93561550717.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71705516539 - 2⁷ = 71705516411 is a prime.

It is a super-2 number, since 2×71705516539² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71705516492 and 71705516501.

It is not a weakly prime, because it can be changed into another prime (71705517539) 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, 35852758269 + 35852758270.

It is an arithmetic number, because the mean of its divisors is an integer number (35852758270).

Almost surely, 2^71705516539 is an apocalyptic number.

71705516539 is a deficient number, since it is larger than the sum of its proper divisors (1).

71705516539 is an equidigital number, since it uses as much as digits as its factorization.

71705516539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 992250, while the sum is 49.

The spelling of 71705516539 in words is "seventy-one billion, seven hundred five million, five hundred sixteen thousand, five hundred thirty-nine".