138450655 has 8 divisors (see below), whose sum is σ = 189875232. Its totient is φ = 94937568.

The previous prime is 138450649. The next prime is 138450661. The reversal of 138450655 is 556054831.

It is an interprime number because it is at equal distance from previous prime (138450649) and next prime (138450661).

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 138450655 - 2³ = 138450647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1977832 + ... + 1977901.

It is an arithmetic number, because the mean of its divisors is an integer number (23734404).

Almost surely, 2^138450655 is an apocalyptic number.

138450655 is a deficient number, since it is larger than the sum of its proper divisors (51424577).

138450655 is an equidigital number, since it uses as much as digits as its factorization.

138450655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3955745.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 138450655 is about 11766.5056410134. The cubic root of 138450655 is about 517.3268326143.

The spelling of 138450655 in words is "one hundred thirty-eight million, four hundred fifty thousand, six hundred fifty-five".