135891678 has 32 divisors (see below), whose sum is σ = 297069696. Its totient is φ = 41187168.

The previous prime is 135891677. The next prime is 135891683. The reversal of 135891678 is 876198531.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135891677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7776 + ... + 18227.

It is an arithmetic number, because the mean of its divisors is an integer number (9283428).

Almost surely, 2^135891678 is an apocalyptic number.

135891678 is an abundant number, since it is smaller than the sum of its proper divisors (161178018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135891678 is a wasteful number, since it uses less digits than its factorization.

135891678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26088.

The product of its digits is 362880, while the sum is 48.

The square root of 135891678 is about 11657.2585971145. The cubic root of 135891678 is about 514.1197493353.

The spelling of 135891678 in words is "one hundred thirty-five million, eight hundred ninety-one thousand, six hundred seventy-eight".