138319123792 has 10 divisors (see below), whose sum is σ = 267993302378. Its totient is φ = 69159561888.

The previous prime is 138319123771. The next prime is 138319123801. The reversal of 138319123792 is 297321913831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 122889509136 + 15429614656 = 350556^2 + 124216^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4322472603 + ... + 4322472634.

Almost surely, 2^138319123792 is an apocalyptic number.

It is an amenable number.

138319123792 is a deficient number, since it is larger than the sum of its proper divisors (129674178586).

138319123792 is an equidigital number, since it uses as much as digits as its factorization.

138319123792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8644945245 (or 8644945239 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The spelling of 138319123792 in words is "one hundred thirty-eight billion, three hundred nineteen million, one hundred twenty-three thousand, seven hundred ninety-two".