216608013518138 has 16 divisors (see below), whose sum is σ = 357155197866720. Its totient is φ = 97706598740400.

The previous prime is 216608013518131. The next prime is 216608013518173. The reversal of 216608013518138 is 831815310806612.

It is a self number, because there is not a number n which added to its sum of digits gives 216608013518138.

It is not an unprimeable number, because it can be changed into a prime (216608013518131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37579458173 + ... + 37579463936.

It is an arithmetic number, because the mean of its divisors is an integer number (22322199866670).

Almost surely, 2^{216608013518138} is an apocalyptic number.

216608013518138 is a deficient number, since it is larger than the sum of its proper divisors (140547184348582).

216608013518138 is a wasteful number, since it uses less digits than its factorization.

216608013518138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75158922253.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 216608013518138 in words is "two hundred sixteen trillion, six hundred eight billion, thirteen million, five hundred eighteen thousand, one hundred thirty-eight".