138973944236 has 12 divisors (see below), whose sum is σ = 249136217400. Its totient is φ = 67792167840.

The previous prime is 138973944233. The next prime is 138973944259. The reversal of 138973944236 is 632449379831.

138973944236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138973944233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423700886 + ... + 423701213.

It is an arithmetic number, because the mean of its divisors is an integer number (20761351450).

Almost surely, 2^138973944236 is an apocalyptic number.

It is an amenable number.

138973944236 is a deficient number, since it is larger than the sum of its proper divisors (110162273164).

138973944236 is a wasteful number, since it uses less digits than its factorization.

138973944236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847402144 (or 847402142 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 59.

The spelling of 138973944236 in words is "one hundred thirty-eight billion, nine hundred seventy-three million, nine hundred forty-four thousand, two hundred thirty-six".