138018427845 has 16 divisors (see below), whose sum is σ = 224125448640. Its totient is φ = 72511173504.

The previous prime is 138018427837. The next prime is 138018427933. The reversal of 138018427845 is 548724810831.

It is a happy number.

It is not a de Polignac number, because 138018427845 - 2³ = 138018427837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68664880 + ... + 68666889.

It is an arithmetic number, because the mean of its divisors is an integer number (14007840540).

Almost surely, 2^138018427845 is an apocalyptic number.

138018427845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138018427845 is a deficient number, since it is larger than the sum of its proper divisors (86107020795).

138018427845 is a wasteful number, since it uses less digits than its factorization.

138018427845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137331844.

The product of its (nonzero) digits is 1720320, while the sum is 51.

The spelling of 138018427845 in words is "one hundred thirty-eight billion, eighteen million, four hundred twenty-seven thousand, eight hundred forty-five".