138936445497 has 12 divisors (see below), whose sum is σ = 203681290800. Its totient is φ = 91241844408.

The previous prime is 138936445463. The next prime is 138936445537. The reversal of 138936445497 is 794544639831.

138936445497 is a `hidden beast` number, since 1 + 3 + 8 + 93 + 6 + 4 + 454 + 97 = 666.

It is not a de Polignac number, because 138936445497 - 2¹⁰ = 138936444473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138936449497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115203747 + ... + 115204952.

It is an arithmetic number, because the mean of its divisors is an integer number (16973440900).

Almost surely, 2^138936445497 is an apocalyptic number.

It is an amenable number.

138936445497 is a deficient number, since it is larger than the sum of its proper divisors (64744845303).

138936445497 is a wasteful number, since it uses less digits than its factorization.

138936445497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230408772 (or 230408769 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 138936445497 in words is "one hundred thirty-eight billion, nine hundred thirty-six million, four hundred forty-five thousand, four hundred ninety-seven".