135258439678 has 4 divisors (see below), whose sum is σ = 202887659520. Its totient is φ = 67629219838.

The previous prime is 135258439637. The next prime is 135258439681. The reversal of 135258439678 is 876934852531.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33814609918 + ... + 33814609921.

It is an arithmetic number, because the mean of its divisors is an integer number (50721914880).

Almost surely, 2^135258439678 is an apocalyptic number.

135258439678 is a deficient number, since it is larger than the sum of its proper divisors (67629219842).

135258439678 is an equidigital number, since it uses as much as digits as its factorization.

135258439678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67629219841.

The product of its digits is 43545600, while the sum is 61.

The spelling of 135258439678 in words is "one hundred thirty-five billion, two hundred fifty-eight million, four hundred thirty-nine thousand, six hundred seventy-eight".