138555671 has 8 divisors (see below), whose sum is σ = 141669120. Its totient is φ = 135449208.

The previous prime is 138555667. The next prime is 138555689. The reversal of 138555671 is 176555831.

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 138555671 - 2² = 138555667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138555071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73280 + ... + 75146.

It is an arithmetic number, because the mean of its divisors is an integer number (17708640).

Almost surely, 2^138555671 is an apocalyptic number.

138555671 is a deficient number, since it is larger than the sum of its proper divisors (3113449).

138555671 is a wasteful number, since it uses less digits than its factorization.

138555671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493.

The product of its digits is 126000, while the sum is 41.

The square root of 138555671 is about 11770.9672924531. The cubic root of 138555671 is about 517.4575984925.

The spelling of 138555671 in words is "one hundred thirty-eight million, five hundred fifty-five thousand, six hundred seventy-one".