135691112569 has 4 divisors (see below), whose sum is σ = 135694547280. Its totient is φ = 135687677860.

The previous prime is 135691112561. The next prime is 135691112581. The reversal of 135691112569 is 965211196531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135691112569 - 2³ = 135691112561 is a prime.

It is a super-2 number, since 2×135691112569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135691112561) 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, 1657399 + ... + 1737340.

It is an arithmetic number, because the mean of its divisors is an integer number (33923636820).

Almost surely, 2^135691112569 is an apocalyptic number.

It is an amenable number.

135691112569 is a deficient number, since it is larger than the sum of its proper divisors (3434711).

135691112569 is an equidigital number, since it uses as much as digits as its factorization.

135691112569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434710.

The product of its digits is 437400, while the sum is 49.

The spelling of 135691112569 in words is "one hundred thirty-five billion, six hundred ninety-one million, one hundred twelve thousand, five hundred sixty-nine".