1243216116544 has 28 divisors (see below), whose sum is σ = 2472031497888. Its totient is φ = 620342038400.

The previous prime is 1243216116529. The next prime is 1243216116547. The reversal of 1243216116544 is 4456116123421.

It is a junction number, because it is equal to n+sod(n) for n = 1243216116497 and 1243216116506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243216116547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19749892 + ... + 19812739.

Almost surely, 2^{1243216116544} is an apocalyptic number.

It is an amenable number.

1243216116544 is a deficient number, since it is larger than the sum of its proper divisors (1228815381344).

1243216116544 is an equidigital number, since it uses as much as digits as its factorization.

1243216116544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39563134 (or 39563124 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The spelling of 1243216116544 in words is "one trillion, two hundred forty-three billion, two hundred sixteen million, one hundred sixteen thousand, five hundred forty-four".