78530342254409 has 2 divisors, whose sum is σ = 78530342254410. Its totient is φ = 78530342254408.

The previous prime is 78530342254391. The next prime is 78530342254417. The reversal of 78530342254409 is 90445224303587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67253694697225 + 11276647557184 = 8200835^2 + 3358072^2 .

It is an emirp because it is prime and its reverse (90445224303587) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78530342254409 is a prime.

It is not a weakly prime, because it can be changed into another prime (78530342224409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39265171127204 + 39265171127205.

It is an arithmetic number, because the mean of its divisors is an integer number (39265171127205).

Almost surely, 2^{78530342254409} is an apocalyptic number.

It is an amenable number.

78530342254409 is a deficient number, since it is larger than the sum of its proper divisors (1).

78530342254409 is an equidigital number, since it uses as much as digits as its factorization.

78530342254409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29030400, while the sum is 56.

The spelling of 78530342254409 in words is "seventy-eight trillion, five hundred thirty billion, three hundred forty-two million, two hundred fifty-four thousand, four hundred nine".