138669140992 has 88 divisors (see below), whose sum is σ = 286467038352. Its totient is φ = 67049472000.

The previous prime is 138669140989. The next prime is 138669141041. The reversal of 138669140992 is 299041966831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4431642 + ... + 4462822.

It is an arithmetic number, because the mean of its divisors is an integer number (3255307254).

Almost surely, 2^138669140992 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 138669140992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143233519176).

138669140992 is an abundant number, since it is smaller than the sum of its proper divisors (147797897360).

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

138669140992 is a wasteful number, since it uses less digits than its factorization.

138669140992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31345 (or 31327 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 58.

The spelling of 138669140992 in words is "one hundred thirty-eight billion, six hundred sixty-nine million, one hundred forty thousand, nine hundred ninety-two".