135639074638 has 8 divisors (see below), whose sum is σ = 203816185920. Its totient is φ = 67700346000.

The previous prime is 135639074629. The next prime is 135639074639. The reversal of 135639074638 is 836470936531.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135639074639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59594238 + ... + 59596513.

It is an arithmetic number, because the mean of its divisors is an integer number (25477023240).

Almost surely, 2^135639074638 is an apocalyptic number.

135639074638 is a deficient number, since it is larger than the sum of its proper divisors (68177111282).

135639074638 is a wasteful number, since it uses less digits than its factorization.

135639074638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119191322.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 135639074638 in words is "one hundred thirty-five billion, six hundred thirty-nine million, seventy-four thousand, six hundred thirty-eight".