135686643867578 has 8 divisors (see below), whose sum is σ = 203530408071840. Its totient is φ = 67843174510300.

The previous prime is 135686643867499. The next prime is 135686643867613. The reversal of 135686643867578 is 875768346686531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135686643867496 and 135686643867505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72557648 + ... + 74404203.

It is an arithmetic number, because the mean of its divisors is an integer number (25441301008980).

Almost surely, 2^{135686643867578} is an apocalyptic number.

135686643867578 is a deficient number, since it is larger than the sum of its proper divisors (67843764204262).

135686643867578 is a wasteful number, since it uses less digits than its factorization.

135686643867578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147423492.

The product of its digits is 29262643200, while the sum is 83.

The spelling of 135686643867578 in words is "one hundred thirty-five trillion, six hundred eighty-six billion, six hundred forty-three million, eight hundred sixty-seven thousand, five hundred seventy-eight".