138235208484765 has 128 divisors (see below), whose sum is σ = 272506747392000. Its totient is φ = 58397356118016.

The previous prime is 138235208484743. The next prime is 138235208484823. The reversal of 138235208484765 is 567484802532831.

It is a happy number.

It is not a de Polignac number, because 138235208484765 - 2⁶ = 138235208484701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138235208484696 and 138235208484705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 86514466 + ... + 88097804.

It is an arithmetic number, because the mean of its divisors is an integer number (2128958964000).

Almost surely, 2^{138235208484765} is an apocalyptic number.

138235208484765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138235208484765 is a deficient number, since it is larger than the sum of its proper divisors (134271538907235).

138235208484765 is a wasteful number, since it uses less digits than its factorization.

138235208484765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584259.

The product of its (nonzero) digits is 309657600, while the sum is 66.

The spelling of 138235208484765 in words is "one hundred thirty-eight trillion, two hundred thirty-five billion, two hundred eight million, four hundred eighty-four thousand, seven hundred sixty-five".