1243216116543 has 4 divisors (see below), whose sum is σ = 1657621488728. Its totient is φ = 828810744360.

The previous prime is 1243216116529. The next prime is 1243216116547. The reversal of 1243216116543 is 3456116123421.

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

It is not a de Polignac number, because 1243216116543 - 2⁶ = 1243216116479 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207202686088 + ... + 207202686093.

It is an arithmetic number, because the mean of its divisors is an integer number (414405372182).

Almost surely, 2^{1243216116543} is an apocalyptic number.

1243216116543 is a deficient number, since it is larger than the sum of its proper divisors (414405372185).

1243216116543 is an equidigital number, since it uses as much as digits as its factorization.

1243216116543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414405372184.

The product of its digits is 103680, while the sum is 39.

The spelling of 1243216116543 in words is "one trillion, two hundred forty-three billion, two hundred sixteen million, one hundred sixteen thousand, five hundred forty-three".