78456945379 has 2 divisors, whose sum is σ = 78456945380. Its totient is φ = 78456945378.

The previous prime is 78456945367. The next prime is 78456945403. The reversal of 78456945379 is 97354965487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78456945379 - 2⁷ = 78456945251 is a prime.

It is not a weakly prime, because it can be changed into another prime (78456943379) 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, 39228472689 + 39228472690.

It is an arithmetic number, because the mean of its divisors is an integer number (39228472690).

Almost surely, 2^78456945379 is an apocalyptic number.

78456945379 is a deficient number, since it is larger than the sum of its proper divisors (1).

78456945379 is an equidigital number, since it uses as much as digits as its factorization.

78456945379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 228614400, while the sum is 67.

The spelling of 78456945379 in words is "seventy-eight billion, four hundred fifty-six million, nine hundred forty-five thousand, three hundred seventy-nine".