138852058778238 has 16 divisors (see below), whose sum is σ = 299065972753296. Its totient is φ = 42723710393280.

The previous prime is 138852058778201. The next prime is 138852058778243. The reversal of 138852058778238 is 832877850258831.

It is a self number, because there is not a number n which added to its sum of digits gives 138852058778238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890077299783 + ... + 890077299938.

It is an arithmetic number, because the mean of its divisors is an integer number (18691623297081).

Almost surely, 2^{138852058778238} is an apocalyptic number.

138852058778238 is an abundant number, since it is smaller than the sum of its proper divisors (160213913975058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138852058778238 is a wasteful number, since it uses less digits than its factorization.

138852058778238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780154599739.

The product of its (nonzero) digits is 1445068800, while the sum is 75.

The spelling of 138852058778238 in words is "one hundred thirty-eight trillion, eight hundred fifty-two billion, fifty-eight million, seven hundred seventy-eight thousand, two hundred thirty-eight".