138764512124 has 24 divisors (see below), whose sum is σ = 277628617728. Its totient is φ = 59449163760.

The previous prime is 138764512123. The next prime is 138764512141. The reversal of 138764512124 is 421215467831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138764512121) by changing a digit.

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, 809684 + ... + 965979.

It is an arithmetic number, because the mean of its divisors is an integer number (11567859072).

Almost surely, 2^138764512124 is an apocalyptic number.

138764512124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138764512124 is an abundant number, since it is smaller than the sum of its proper divisors (138864105604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138764512124 is a wasteful number, since it uses less digits than its factorization.

138764512124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778465 (or 1778463 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

Adding to 138764512124 its reverse (421215467831), we get a palindrome (559979979955).

The spelling of 138764512124 in words is "one hundred thirty-eight billion, seven hundred sixty-four million, five hundred twelve thousand, one hundred twenty-four".