78047944954867 has 2 divisors, whose sum is σ = 78047944954868. Its totient is φ = 78047944954866.

The previous prime is 78047944954823. The next prime is 78047944954879. The reversal of 78047944954867 is 76845944974087.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78047944954867 is a prime.

It is not a weakly prime, because it can be changed into another prime (78047944955867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39023972477433 + 39023972477434.

It is an arithmetic number, because the mean of its divisors is an integer number (39023972477434).

Almost surely, 2^{78047944954867} is an apocalyptic number.

78047944954867 is a deficient number, since it is larger than the sum of its proper divisors (1).

78047944954867 is an equidigital number, since it uses as much as digits as its factorization.

78047944954867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13655900160, while the sum is 82.

The spelling of 78047944954867 in words is "seventy-eight trillion, forty-seven billion, nine hundred forty-four million, nine hundred fifty-four thousand, eight hundred sixty-seven".