78040238443 has 2 divisors, whose sum is σ = 78040238444. Its totient is φ = 78040238442.

The previous prime is 78040238413. The next prime is 78040238467. The reversal of 78040238443 is 34483204087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78040238443 - 2⁹ = 78040237931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78040238443.

It is not a weakly prime, because it can be changed into another prime (78040238413) 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, 39020119221 + 39020119222.

It is an arithmetic number, because the mean of its divisors is an integer number (39020119222).

Almost surely, 2^78040238443 is an apocalyptic number.

78040238443 is a deficient number, since it is larger than the sum of its proper divisors (1).

78040238443 is an equidigital number, since it uses as much as digits as its factorization.

78040238443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 43.

The spelling of 78040238443 in words is "seventy-eight billion, forty million, two hundred thirty-eight thousand, four hundred forty-three".