1216333438744 has 8 divisors (see below), whose sum is σ = 2280625197660. Its totient is φ = 608166719368.

The previous prime is 1216333438741. The next prime is 1216333438763. The reversal of 1216333438744 is 4478343336121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216333438741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76020839914 + ... + 76020839929.

Almost surely, 2^{1216333438744} is an apocalyptic number.

It is an amenable number.

1216333438744 is a deficient number, since it is larger than the sum of its proper divisors (1064291758916).

1216333438744 is a wasteful number, since it uses less digits than its factorization.

1216333438744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152041679849 (or 152041679845 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 49.

The spelling of 1216333438744 in words is "one trillion, two hundred sixteen billion, three hundred thirty-three million, four hundred thirty-eight thousand, seven hundred forty-four".