135638323421 has 8 divisors (see below), whose sum is σ = 139344582144. Its totient is φ = 131934188880.

The previous prime is 135638323417. The next prime is 135638323439. The reversal of 135638323421 is 124323836531.

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

It is a cyclic number.

It is not a de Polignac number, because 135638323421 - 2² = 135638323417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135638323411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401165 + ... + 657426.

It is an arithmetic number, because the mean of its divisors is an integer number (17418072768).

Almost surely, 2^135638323421 is an apocalyptic number.

It is an amenable number.

135638323421 is a deficient number, since it is larger than the sum of its proper divisors (3706258723).

135638323421 is a wasteful number, since it uses less digits than its factorization.

135638323421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062091.

The product of its digits is 311040, while the sum is 41.

The spelling of 135638323421 in words is "one hundred thirty-five billion, six hundred thirty-eight million, three hundred twenty-three thousand, four hundred twenty-one".