135685806486217 has 12 divisors (see below), whose sum is σ = 155568759685020. Its totient is φ = 117880881650688.

The previous prime is 135685806486029. The next prime is 135685806486283. The reversal of 135685806486217 is 712684608586531.

It can be written as a sum of positive squares in 6 ways, for example, as 41490023481 + 135644316462736 = 203691^2 + 11646644^2 .

It is not a de Polignac number, because 135685806486217 - 2¹¹ = 135685806484169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135685806406217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23613955792 + ... + 23613961537.

It is an arithmetic number, because the mean of its divisors is an integer number (12964063307085).

Almost surely, 2^{135685806486217} is an apocalyptic number.

135685806486217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

135685806486217 is a deficient number, since it is larger than the sum of its proper divisors (19882953198803).

135685806486217 is a wasteful number, since it uses less digits than its factorization.

135685806486217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47227917372 (or 47227917359 counting only the distinct ones).

The product of its (nonzero) digits is 464486400, while the sum is 70.

The spelling of 135685806486217 in words is "one hundred thirty-five trillion, six hundred eighty-five billion, eight hundred six million, four hundred eighty-six thousand, two hundred seventeen".