78431810071 has 2 divisors, whose sum is σ = 78431810072. Its totient is φ = 78431810070.

The previous prime is 78431810029. The next prime is 78431810137. The reversal of 78431810071 is 17001813487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78431810071 - 2¹⁹ = 78431285783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78431810371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39215905035 + 39215905036.

It is an arithmetic number, because the mean of its divisors is an integer number (39215905036).

Almost surely, 2^78431810071 is an apocalyptic number.

78431810071 is a deficient number, since it is larger than the sum of its proper divisors (1).

78431810071 is an equidigital number, since it uses as much as digits as its factorization.

78431810071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 40.

The spelling of 78431810071 in words is "seventy-eight billion, four hundred thirty-one million, eight hundred ten thousand, seventy-one".