138013794212 has 24 divisors (see below), whose sum is σ = 276642374400. Its totient is φ = 59017029120.

The previous prime is 138013794199. The next prime is 138013794253. The reversal of 138013794212 is 212497310831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 138013794212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5476364 + ... + 5501507.

It is an arithmetic number, because the mean of its divisors is an integer number (11526765600).

Almost surely, 2^138013794212 is an apocalyptic number.

It is an amenable number.

138013794212 is an abundant number, since it is smaller than the sum of its proper divisors (138628580188).

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

138013794212 is a wasteful number, since it uses less digits than its factorization.

138013794212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10978331 (or 10978329 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 138013794212 in words is "one hundred thirty-eight billion, thirteen million, seven hundred ninety-four thousand, two hundred twelve".