138041555 has 16 divisors (see below), whose sum is σ = 174765600. Its totient is φ = 104382720.

The previous prime is 138041551. The next prime is 138041557. The reversal of 138041555 is 555140831.

It is not a de Polignac number, because 138041555 - 2² = 138041551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138041551) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 48101 + ... + 50889.

It is an arithmetic number, because the mean of its divisors is an integer number (10922850).

Almost surely, 2^138041555 is an apocalyptic number.

138041555 is a deficient number, since it is larger than the sum of its proper divisors (36724045).

138041555 is a wasteful number, since it uses less digits than its factorization.

138041555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 138041555 is about 11749.1086895985. The cubic root of 138041555 is about 516.8167899981.

The spelling of 138041555 in words is "one hundred thirty-eight million, forty-one thousand, five hundred fifty-five".