78426030071 has 2 divisors, whose sum is σ = 78426030072. Its totient is φ = 78426030070.

The previous prime is 78426030049. The next prime is 78426030097. The reversal of 78426030071 is 17003062487.

It is a weak prime.

It is an emirp because it is prime and its reverse (17003062487) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78426030071 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78426030031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39213015035 + 39213015036.

It is an arithmetic number, because the mean of its divisors is an integer number (39213015036).

Almost surely, 2^78426030071 is an apocalyptic number.

78426030071 is a deficient number, since it is larger than the sum of its proper divisors (1).

78426030071 is an equidigital number, since it uses as much as digits as its factorization.

78426030071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 78426030071 in words is "seventy-eight billion, four hundred twenty-six million, thirty thousand, seventy-one".