138686568027 has 24 divisors (see below), whose sum is σ = 215213760000. Its totient is φ = 79209655056.

The previous prime is 138686568017. The next prime is 138686568103. The reversal of 138686568027 is 720865686831.

It is not a de Polignac number, because 138686568027 - 2⁸ = 138686567771 is a prime.

It is a super-2 number, since 2×138686568027² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138686568017) 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 23 ways as a sum of consecutive naturals, for example, 57874 + ... + 529832.

It is an arithmetic number, because the mean of its divisors is an integer number (8967240000).

Almost surely, 2^138686568027 is an apocalyptic number.

138686568027 is a deficient number, since it is larger than the sum of its proper divisors (76527191973).

138686568027 is a wasteful number, since it uses less digits than its factorization.

138686568027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473975 (or 473968 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 138686568027 in words is "one hundred thirty-eight billion, six hundred eighty-six million, five hundred sixty-eight thousand, twenty-seven".