138206253389 has 16 divisors (see below), whose sum is σ = 145711621440. Its totient is φ = 130952845440.

The previous prime is 138206253377. The next prime is 138206253407. The reversal of 138206253389 is 983352602831.

It is not a de Polignac number, because 138206253389 - 2⁴ = 138206253373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138206253329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143402 + ... + 544955.

It is an arithmetic number, because the mean of its divisors is an integer number (9106976340).

Almost surely, 2^138206253389 is an apocalyptic number.

It is an amenable number.

138206253389 is a deficient number, since it is larger than the sum of its proper divisors (7505368051).

138206253389 is an equidigital number, since it uses as much as digits as its factorization.

138206253389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688540.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 138206253389 in words is "one hundred thirty-eight billion, two hundred six million, two hundred fifty-three thousand, three hundred eighty-nine".