85681522518619 has 2 divisors, whose sum is σ = 85681522518620. Its totient is φ = 85681522518618.

The previous prime is 85681522518617. The next prime is 85681522518659. The reversal of 85681522518619 is 91681522518658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85681522518619 - 2¹ = 85681522518617 is a prime.

It is a super-2 number, since 2×85681522518619² (a number of 29 digits) contains 22 as substring.

Together with 85681522518617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85681522518617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42840761259309 + 42840761259310.

It is an arithmetic number, because the mean of its divisors is an integer number (42840761259310).

Almost surely, 2^{85681522518619} is an apocalyptic number.

85681522518619 is a deficient number, since it is larger than the sum of its proper divisors (1).

85681522518619 is an equidigital number, since it uses as much as digits as its factorization.

85681522518619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944000, while the sum is 67.

The spelling of 85681522518619 in words is "eighty-five trillion, six hundred eighty-one billion, five hundred twenty-two million, five hundred eighteen thousand, six hundred nineteen".