138718220277 has 32 divisors (see below), whose sum is σ = 229432655872. Its totient is φ = 72593889984.

The previous prime is 138718220257. The next prime is 138718220279. The reversal of 138718220277 is 772022817831.

It is not a de Polignac number, because 138718220277 - 2⁶ = 138718220213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138718220279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1965823 + ... + 2035164.

It is an arithmetic number, because the mean of its divisors is an integer number (7169770496).

Almost surely, 2^138718220277 is an apocalyptic number.

It is an amenable number.

138718220277 is a deficient number, since it is larger than the sum of its proper divisors (90714435595).

138718220277 is a wasteful number, since it uses less digits than its factorization.

138718220277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001137.

The product of its (nonzero) digits is 526848, while the sum is 48.

The spelling of 138718220277 in words is "one hundred thirty-eight billion, seven hundred eighteen million, two hundred twenty thousand, two hundred seventy-seven".