135566678889 has 32 divisors (see below), whose sum is σ = 206629619840. Its totient is φ = 87809204736.

The previous prime is 135566678873. The next prime is 135566678893. The reversal of 135566678889 is 988876665531.

It is a happy number.

It is not a de Polignac number, because 135566678889 - 2⁴ = 135566678873 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (135566678809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381232 + ... + 645345.

It is an arithmetic number, because the mean of its divisors is an integer number (6457175620).

Almost surely, 2^135566678889 is an apocalyptic number.

It is an amenable number.

135566678889 is a deficient number, since it is larger than the sum of its proper divisors (71062940951).

135566678889 is a wasteful number, since it uses less digits than its factorization.

135566678889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026726 (or 1026720 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 72.

The spelling of 135566678889 in words is "one hundred thirty-five billion, five hundred sixty-six million, six hundred seventy-eight thousand, eight hundred eighty-nine".