135721888318 has 8 divisors (see below), whose sum is σ = 212434260048. Its totient is φ = 64910468304.

The previous prime is 135721888307. The next prime is 135721888321. The reversal of 135721888318 is 813888127531.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475237871 + ... + 1475237962.

It is an arithmetic number, because the mean of its divisors is an integer number (26554282506).

Almost surely, 2^135721888318 is an apocalyptic number.

135721888318 is a deficient number, since it is larger than the sum of its proper divisors (76712371730).

135721888318 is a wasteful number, since it uses less digits than its factorization.

135721888318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950475858.

The product of its digits is 2580480, while the sum is 55.

The spelling of 135721888318 in words is "one hundred thirty-five billion, seven hundred twenty-one million, eight hundred eighty-eight thousand, three hundred eighteen".