138805338255 has 32 divisors (see below), whose sum is σ = 228583772928. Its totient is φ = 71881555200.

The previous prime is 138805338253. The next prime is 138805338271. The reversal of 138805338255 is 552833508831.

It is not a de Polignac number, because 138805338255 - 2¹ = 138805338253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138805338198 and 138805338207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138805338253) 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, 405069 + ... + 664598.

It is an arithmetic number, because the mean of its divisors is an integer number (7143242904).

Almost surely, 2^138805338255 is an apocalyptic number.

138805338255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138805338255 is a deficient number, since it is larger than the sum of its proper divisors (89778434673).

138805338255 is a wasteful number, since it uses less digits than its factorization.

138805338255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069927.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 138805338255 in words is "one hundred thirty-eight billion, eight hundred five million, three hundred thirty-eight thousand, two hundred fifty-five".