138511671838 has 16 divisors (see below), whose sum is σ = 208298225520. Its totient is φ = 69079046400.

The previous prime is 138511671833. The next prime is 138511671871. The reversal of 138511671838 is 838176115831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138511671833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2490478 + ... + 2545486.

It is an arithmetic number, because the mean of its divisors is an integer number (13018639095).

Almost surely, 2^138511671838 is an apocalyptic number.

138511671838 is a deficient number, since it is larger than the sum of its proper divisors (69786553682).

138511671838 is a wasteful number, since it uses less digits than its factorization.

138511671838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58203.

The product of its digits is 967680, while the sum is 52.

The spelling of 138511671838 in words is "one hundred thirty-eight billion, five hundred eleven million, six hundred seventy-one thousand, eight hundred thirty-eight".