138553355518 has 16 divisors (see below), whose sum is σ = 211023513360. Its totient is φ = 68219983296.

The previous prime is 138553355411. The next prime is 138553355519. The reversal of 138553355518 is 815553355831.

138553355518 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138553355519) 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, 1914055 + ... + 1985122.

It is an arithmetic number, because the mean of its divisors is an integer number (13188969585).

Almost surely, 2^138553355518 is an apocalyptic number.

138553355518 is a deficient number, since it is larger than the sum of its proper divisors (72470157842).

138553355518 is a wasteful number, since it uses less digits than its factorization.

138553355518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3899451.

The product of its digits is 5400000, while the sum is 52.

The spelling of 138553355518 in words is "one hundred thirty-eight billion, five hundred fifty-three million, three hundred fifty-five thousand, five hundred eighteen".