138974936857 has 8 divisors (see below), whose sum is σ = 145556429760. Its totient is φ = 132438369360.

The previous prime is 138974936797. The next prime is 138974936861. The reversal of 138974936857 is 758639479831.

138974936857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138974936857 - 2¹¹ = 138974934809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138974936057) 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 7 ways as a sum of consecutive naturals, for example, 11225019 + ... + 11237392.

It is an arithmetic number, because the mean of its divisors is an integer number (18194553720).

Almost surely, 2^138974936857 is an apocalyptic number.

It is an amenable number.

138974936857 is a deficient number, since it is larger than the sum of its proper divisors (6581492903).

138974936857 is a wasteful number, since it uses less digits than its factorization.

138974936857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22462703.

The product of its digits is 274337280, while the sum is 70.

The spelling of 138974936857 in words is "one hundred thirty-eight billion, nine hundred seventy-four million, nine hundred thirty-six thousand, eight hundred fifty-seven".