135685806308087 has 4 divisors (see below), whose sum is σ = 155069492923536. Its totient is φ = 116302119692640.

The previous prime is 135685806307981. The next prime is 135685806308161. The reversal of 135685806308087 is 780803608586531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 135685806308087 - 2¹⁶ = 135685806242551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135685806208087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9691843307714 + ... + 9691843307727.

It is an arithmetic number, because the mean of its divisors is an integer number (38767373230884).

Almost surely, 2^{135685806308087} is an apocalyptic number.

135685806308087 is a deficient number, since it is larger than the sum of its proper divisors (19383686615449).

135685806308087 is an equidigital number, since it uses as much as digits as its factorization.

135685806308087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19383686615448.

The product of its (nonzero) digits is 232243200, while the sum is 68.

The spelling of 135685806308087 in words is "one hundred thirty-five trillion, six hundred eighty-five billion, eight hundred six million, three hundred eight thousand, eighty-seven".