138443801044 has 24 divisors (see below), whose sum is σ = 242646243840. Its totient is φ = 69116364096.

The previous prime is 138443801033. The next prime is 138443801071. The reversal of 138443801044 is 440108344831.

It is a junction number, because it is equal to n+sod(n) for n = 138443800988 and 138443801006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12949069 + ... + 12959755.

It is an arithmetic number, because the mean of its divisors is an integer number (10110260160).

Almost surely, 2^138443801044 is an apocalyptic number.

It is an amenable number.

138443801044 is a deficient number, since it is larger than the sum of its proper divisors (104202442796).

138443801044 is a wasteful number, since it uses less digits than its factorization.

138443801044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15327 (or 15325 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 138443801044 in words is "one hundred thirty-eight billion, four hundred forty-three million, eight hundred one thousand, forty-four".