138283945689 has 4 divisors (see below), whose sum is σ = 184378594256. Its totient is φ = 92189297124.

The previous prime is 138283945673. The next prime is 138283945721. The reversal of 138283945689 is 986549382831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 138283945689 - 2⁴ = 138283945673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138283245689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23047324279 + ... + 23047324284.

It is an arithmetic number, because the mean of its divisors is an integer number (46094648564).

Almost surely, 2^138283945689 is an apocalyptic number.

It is an amenable number.

138283945689 is a deficient number, since it is larger than the sum of its proper divisors (46094648567).

138283945689 is an equidigital number, since it uses as much as digits as its factorization.

138283945689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46094648566.

The product of its digits is 89579520, while the sum is 66.

The spelling of 138283945689 in words is "one hundred thirty-eight billion, two hundred eighty-three million, nine hundred forty-five thousand, six hundred eighty-nine".