216658939381390 has 32 divisors (see below), whose sum is σ = 433466529847776. Its totient is φ = 77298558130560.

The previous prime is 216658939381327. The next prime is 216658939381399. The reversal of 216658939381390 is 93183939856612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216658939381399) 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 15 ways as a sum of consecutive naturals, for example, 18581378337 + ... + 18581389996.

It is an arithmetic number, because the mean of its divisors is an integer number (13545829057743).

Almost surely, 2^{216658939381390} is an apocalyptic number.

216658939381390 is an abundant number, since it is smaller than the sum of its proper divisors (216807590466386).

216658939381390 is a wasteful number, since it uses less digits than its factorization.

216658939381390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37162768404.

The product of its (nonzero) digits is 453496320, while the sum is 73.

The spelling of 216658939381390 in words is "two hundred sixteen trillion, six hundred fifty-eight billion, nine hundred thirty-nine million, three hundred eighty-one thousand, three hundred ninety".