1216444893323 has 4 divisors (see below), whose sum is σ = 1327030792728. Its totient is φ = 1105858993920.

The previous prime is 1216444893317. The next prime is 1216444893347. The reversal of 1216444893323 is 3233984446121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1216444893323 - 2²⁴ = 1216428116107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216444893383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55292949686 + ... + 55292949707.

It is an arithmetic number, because the mean of its divisors is an integer number (331757698182).

Almost surely, 2^{1216444893323} is an apocalyptic number.

1216444893323 is a deficient number, since it is larger than the sum of its proper divisors (110585899405).

1216444893323 is a wasteful number, since it uses less digits than its factorization.

1216444893323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110585899404.

The product of its digits is 2985984, while the sum is 50.

The spelling of 1216444893323 in words is "one trillion, two hundred sixteen billion, four hundred forty-four million, eight hundred ninety-three thousand, three hundred twenty-three".