138459073857 has 16 divisors (see below), whose sum is σ = 198826692288. Its totient is φ = 85199728320.

The previous prime is 138459073849. The next prime is 138459073861. The reversal of 138459073857 is 758370954831.

It is a happy number.

It is not a de Polignac number, because 138459073857 - 2³ = 138459073849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138459073857.

It is not an unprimeable number, because it can be changed into a prime (138459073877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491878 + ... + 720320.

It is an arithmetic number, because the mean of its divisors is an integer number (12426668268).

Almost surely, 2^138459073857 is an apocalyptic number.

It is an amenable number.

138459073857 is a deficient number, since it is larger than the sum of its proper divisors (60367618431).

138459073857 is a wasteful number, since it uses less digits than its factorization.

138459073857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244000.

The product of its (nonzero) digits is 25401600, while the sum is 60.

The spelling of 138459073857 in words is "one hundred thirty-eight billion, four hundred fifty-nine million, seventy-three thousand, eight hundred fifty-seven".