85681522518659 has 2 divisors, whose sum is σ = 85681522518660. Its totient is φ = 85681522518658.

The previous prime is 85681522518619. The next prime is 85681522518667. The reversal of 85681522518659 is 95681522518658.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85681522518659 is a prime.

It is a super-3 number, since 3×85681522518659³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 85681522518592 and 85681522518601.

It is not a weakly prime, because it can be changed into another prime (85681522518619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42840761259329 + 42840761259330.

It is an arithmetic number, because the mean of its divisors is an integer number (42840761259330).

Almost surely, 2^{85681522518659} is an apocalyptic number.

85681522518659 is a deficient number, since it is larger than the sum of its proper divisors (1).

85681522518659 is an equidigital number, since it uses as much as digits as its factorization.

85681522518659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720000, while the sum is 71.

Subtracting 85681522518659 from its reverse (95681522518658), we obtain a palindrome (9999999999999).

The spelling of 85681522518659 in words is "eighty-five trillion, six hundred eighty-one billion, five hundred twenty-two million, five hundred eighteen thousand, six hundred fifty-nine".