138132439536 has 160 divisors (see below), whose sum is σ = 439431874560. Its totient is φ = 36410499072.

The previous prime is 138132439517. The next prime is 138132439537. The reversal of 138132439536 is 635934231831.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138132439537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9003520 + ... + 9018848.

It is an arithmetic number, because the mean of its divisors is an integer number (2746449216).

Almost surely, 2^138132439536 is an apocalyptic number.

138132439536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138132439536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219715937280).

138132439536 is an abundant number, since it is smaller than the sum of its proper divisors (301299435024).

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

138132439536 is a wasteful number, since it uses less digits than its factorization.

138132439536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17423 (or 17417 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 48.

The spelling of 138132439536 in words is "one hundred thirty-eight billion, one hundred thirty-two million, four hundred thirty-nine thousand, five hundred thirty-six".