78071453329 has 2 divisors, whose sum is σ = 78071453330. Its totient is φ = 78071453328.

The previous prime is 78071453311. The next prime is 78071453377. The reversal of 78071453329 is 92335417087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49205443329 + 28866010000 = 221823^2 + 169900^2 .

It is an emirp because it is prime and its reverse (92335417087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78071453329 - 2¹¹ = 78071451281 is a prime.

It is not a weakly prime, because it can be changed into another prime (78071453309) 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, 39035726664 + 39035726665.

It is an arithmetic number, because the mean of its divisors is an integer number (39035726665).

Almost surely, 2^78071453329 is an apocalyptic number.

It is an amenable number.

78071453329 is a deficient number, since it is larger than the sum of its proper divisors (1).

78071453329 is an equidigital number, since it uses as much as digits as its factorization.

78071453329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 78071453329 in words is "seventy-eight billion, seventy-one million, four hundred fifty-three thousand, three hundred twenty-nine".