216404122366 has 32 divisors (see below), whose sum is σ = 334702813536. Its totient is φ = 104872320000.

The previous prime is 216404122349. The next prime is 216404122411. The reversal of 216404122366 is 663221404612.

It is a congruent number.

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, 15592006 + ... + 15605878.

It is an arithmetic number, because the mean of its divisors is an integer number (10459462923).

Almost surely, 2^216404122366 is an apocalyptic number.

216404122366 is a deficient number, since it is larger than the sum of its proper divisors (118298691170).

216404122366 is a wasteful number, since it uses less digits than its factorization.

216404122366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15148.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 216404122366 its reverse (663221404612), we get a palindrome (879625526978).

The spelling of 216404122366 in words is "two hundred sixteen billion, four hundred four million, one hundred twenty-two thousand, three hundred sixty-six".