138016915 has 8 divisors (see below), whose sum is σ = 165882528. Its totient is φ = 110238720.

The previous prime is 138016909. The next prime is 138016927. The reversal of 138016915 is 519610831.

138016915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138016915 - 2⁷ = 138016787 is a prime.

It is a super-2 number, since 2×138016915² = 38097337652234450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18327 + ... + 24736.

It is an arithmetic number, because the mean of its divisors is an integer number (20735316).

Almost surely, 2^138016915 is an apocalyptic number.

138016915 is a deficient number, since it is larger than the sum of its proper divisors (27865613).

138016915 is an equidigital number, since it uses as much as digits as its factorization.

138016915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43709.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 138016915 is about 11748.0600526215. The cubic root of 138016915 is about 516.7860380905.

The spelling of 138016915 in words is "one hundred thirty-eight million, sixteen thousand, nine hundred fifteen".