138516463684 has 27 divisors (see below), whose sum is σ = 243541095231. Its totient is φ = 68934809160.

The previous prime is 138516463681. The next prime is 138516463691. The reversal of 138516463684 is 486364615831.

It is a happy number.

The square root of 138516463684 is 372178.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138516463681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 282110679 + ... + 282111169.

Almost surely, 2^138516463684 is an apocalyptic number.

138516463684 is the 372178-th square number.

It is an amenable number.

138516463684 is a deficient number, since it is larger than the sum of its proper divisors (105024631547).

138516463684 is an frugal number, since it uses more digits than its factorization.

138516463684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744 (or 872 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The spelling of 138516463684 in words is "one hundred thirty-eight billion, five hundred sixteen million, four hundred sixty-three thousand, six hundred eighty-four".