78504362422643 has 2 divisors, whose sum is σ = 78504362422644. Its totient is φ = 78504362422642.

The previous prime is 78504362422631. The next prime is 78504362422711. The reversal of 78504362422643 is 34622426340587.

It is a weak prime.

It is an emirp because it is prime and its reverse (34622426340587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78504362422643 - 2⁴ = 78504362422627 is a prime.

It is not a weakly prime, because it can be changed into another prime (78504362422243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39252181211321 + 39252181211322.

It is an arithmetic number, because the mean of its divisors is an integer number (39252181211322).

Almost surely, 2^{78504362422643} is an apocalyptic number.

78504362422643 is a deficient number, since it is larger than the sum of its proper divisors (1).

78504362422643 is an equidigital number, since it uses as much as digits as its factorization.

78504362422643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46448640, while the sum is 56.

The spelling of 78504362422643 in words is "seventy-eight trillion, five hundred four billion, three hundred sixty-two million, four hundred twenty-two thousand, six hundred forty-three".