138415986859 has 4 divisors (see below), whose sum is σ = 141361007904. Its totient is φ = 135470965816.

The previous prime is 138415986743. The next prime is 138415986869. The reversal of 138415986859 is 958689514831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958689514831 = 17737 ⋅54050263.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138415986859 is a prime.

It is a super-3 number, since 3×138415986859³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138415986794 and 138415986803.

It is not an unprimeable number, because it can be changed into a prime (138415986869) 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 3 ways as a sum of consecutive naturals, for example, 1472510452 + ... + 1472510545.

It is an arithmetic number, because the mean of its divisors is an integer number (35340251976).

Almost surely, 2^138415986859 is an apocalyptic number.

138415986859 is a deficient number, since it is larger than the sum of its proper divisors (2945021045).

138415986859 is an equidigital number, since it uses as much as digits as its factorization.

138415986859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945021044.

The product of its digits is 74649600, while the sum is 67.

The spelling of 138415986859 in words is "one hundred thirty-eight billion, four hundred fifteen million, nine hundred eighty-six thousand, eight hundred fifty-nine".