1243216116547 has 2 divisors, whose sum is σ = 1243216116548. Its totient is φ = 1243216116546.

The previous prime is 1243216116529. The next prime is 1243216116551. The reversal of 1243216116547 is 7456116123421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243216116547 - 2²⁷ = 1243081898819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243216113547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621608058273 + 621608058274.

It is an arithmetic number, because the mean of its divisors is an integer number (621608058274).

Almost surely, 2^{1243216116547} is an apocalyptic number.

1243216116547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243216116547 is an equidigital number, since it uses as much as digits as its factorization.

1243216116547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The spelling of 1243216116547 in words is "one trillion, two hundred forty-three billion, two hundred sixteen million, one hundred sixteen thousand, five hundred forty-seven".