78424177243 has 2 divisors, whose sum is σ = 78424177244. Its totient is φ = 78424177242.

The previous prime is 78424177241. The next prime is 78424177253. The reversal of 78424177243 is 34277142487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78424177243 - 2¹ = 78424177241 is a prime.

Together with 78424177241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78424177241) 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 as a sum of consecutive naturals, namely, 39212088621 + 39212088622.

It is an arithmetic number, because the mean of its divisors is an integer number (39212088622).

Almost surely, 2^78424177243 is an apocalyptic number.

78424177243 is a deficient number, since it is larger than the sum of its proper divisors (1).

78424177243 is an equidigital number, since it uses as much as digits as its factorization.

78424177243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2107392, while the sum is 49.

The spelling of 78424177243 in words is "seventy-eight billion, four hundred twenty-four million, one hundred seventy-seven thousand, two hundred forty-three".