138434078895 has 32 divisors (see below), whose sum is σ = 253158597120. Its totient is φ = 63278651520.

The previous prime is 138434078863. The next prime is 138434078957. The reversal of 138434078895 is 598870434831.

It is not a de Polignac number, because 138434078895 - 2⁵ = 138434078863 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 (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1312005 + ... + 1413585.

It is an arithmetic number, because the mean of its divisors is an integer number (7911206160).

Almost surely, 2^138434078895 is an apocalyptic number.

138434078895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138434078895 is a deficient number, since it is larger than the sum of its proper divisors (114724518225).

138434078895 is a wasteful number, since it uses less digits than its factorization.

138434078895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114575.

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

The spelling of 138434078895 in words is "one hundred thirty-eight billion, four hundred thirty-four million, seventy-eight thousand, eight hundred ninety-five".