216181831058378 has 32 divisors (see below), whose sum is σ = 332638373938176. Its totient is φ = 105323402950128.

The previous prime is 216181831058279. The next prime is 216181831058381. The reversal of 216181831058378 is 873850138181612.

It is a happy number.

216181831058378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 216181831058378.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26255825 + ... + 33492267.

It is an arithmetic number, because the mean of its divisors is an integer number (10394949185568).

Almost surely, 2^{216181831058378} is an apocalyptic number.

216181831058378 is a deficient number, since it is larger than the sum of its proper divisors (116456542879798).

216181831058378 is a wasteful number, since it uses less digits than its factorization.

216181831058378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7237898.

The product of its (nonzero) digits is 15482880, while the sum is 62.

The spelling of 216181831058378 in words is "two hundred sixteen trillion, one hundred eighty-one billion, eight hundred thirty-one million, fifty-eight thousand, three hundred seventy-eight".