138421445932 has 216 divisors, whose sum is σ = 339289171200. Its totient is φ = 49003637760.

The previous prime is 138421445873. The next prime is 138421445941. The reversal of 138421445932 is 239544124831.

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 71 ways as a sum of consecutive naturals, for example, 11686069 + ... + 11697907.

It is an arithmetic number, because the mean of its divisors is an integer number (1570783200).

Almost surely, 2^138421445932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138421445932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169644585600).

138421445932 is an abundant number, since it is smaller than the sum of its proper divisors (200867725268).

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

138421445932 is a wasteful number, since it uses less digits than its factorization.

138421445932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11925 (or 11905 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The spelling of 138421445932 in words is "one hundred thirty-eight billion, four hundred twenty-one million, four hundred forty-five thousand, nine hundred thirty-two".