138555085 has 8 divisors (see below), whose sum is σ = 167880960. Its totient is φ = 109767504.

The previous prime is 138555077. The next prime is 138555097. The reversal of 138555085 is 580555831.

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

It is a cyclic number.

It is not a de Polignac number, because 138555085 - 2³ = 138555077 is a prime.

It is a congruent 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, 134005 + ... + 135034.

It is an arithmetic number, because the mean of its divisors is an integer number (20985120).

Almost surely, 2^138555085 is an apocalyptic number.

It is an amenable number.

138555085 is a deficient number, since it is larger than the sum of its proper divisors (29325875).

138555085 is a wasteful number, since it uses less digits than its factorization.

138555085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269147.

The product of its (nonzero) digits is 120000, while the sum is 40.

The square root of 138555085 is about 11770.9424006746. The cubic root of 138555085 is about 517.4568689889.

The spelling of 138555085 in words is "one hundred thirty-eight million, five hundred fifty-five thousand, eighty-five".