138950447427 has 48 divisors (see below), whose sum is σ = 231891660000. Its totient is φ = 79238246400.

The previous prime is 138950447413. The next prime is 138950447459. The reversal of 138950447427 is 724744059831.

138950447427 is a `hidden beast` number, since 13 + 89 + 504 + 4 + 7 + 42 + 7 = 666.

It is not a de Polignac number, because 138950447427 - 2²⁰ = 138949398851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138950447527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8543199 + ... + 8559447.

It is an arithmetic number, because the mean of its divisors is an integer number (4831076250).

Almost surely, 2^138950447427 is an apocalyptic number.

138950447427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

138950447427 is a deficient number, since it is larger than the sum of its proper divisors (92941212573).

138950447427 is a wasteful number, since it uses less digits than its factorization.

138950447427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21364 (or 21361 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 138950447427 in words is "one hundred thirty-eight billion, nine hundred fifty million, four hundred forty-seven thousand, four hundred twenty-seven".