138320179393485 has 64 divisors (see below), whose sum is σ = 235353891041280. Its totient is φ = 69221727083520.

The previous prime is 138320179393483. The next prime is 138320179393523. The reversal of 138320179393485 is 584393971023831.

It is not a de Polignac number, because 138320179393485 - 2¹ = 138320179393483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138320179393483) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6844225 + ... + 17985654.

It is an arithmetic number, because the mean of its divisors is an integer number (3677404547520).

Almost surely, 2^{138320179393485} is an apocalyptic number.

138320179393485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138320179393485 is a deficient number, since it is larger than the sum of its proper divisors (97033711647795).

138320179393485 is a wasteful number, since it uses less digits than its factorization.

138320179393485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24830218.

The product of its (nonzero) digits is 117573120, while the sum is 66.

The spelling of 138320179393485 in words is "one hundred thirty-eight trillion, three hundred twenty billion, one hundred seventy-nine million, three hundred ninety-three thousand, four hundred eighty-five".