138028430865 has 16 divisors (see below), whose sum is σ = 237833604288. Its totient is φ = 67952458176.

The previous prime is 138028430863. The next prime is 138028430873. The reversal of 138028430865 is 568034820831.

It is not a de Polignac number, because 138028430865 - 2¹ = 138028430863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138028430861) by changing a digit.

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, 353918859 + ... + 353919248.

It is an arithmetic number, because the mean of its divisors is an integer number (14864600268).

Almost surely, 2^138028430865 is an apocalyptic number.

138028430865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138028430865 is a deficient number, since it is larger than the sum of its proper divisors (99805173423).

138028430865 is a wasteful number, since it uses less digits than its factorization.

138028430865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707838128.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 138028430865 in words is "one hundred thirty-eight billion, twenty-eight million, four hundred thirty thousand, eight hundred sixty-five".