78069340399 has 2 divisors, whose sum is σ = 78069340400. Its totient is φ = 78069340398.

The previous prime is 78069340333. The next prime is 78069340403. The reversal of 78069340399 is 99304396087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78069340399 - 2¹³ = 78069332207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78069340309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39034670199 + 39034670200.

It is an arithmetic number, because the mean of its divisors is an integer number (39034670200).

Almost surely, 2^78069340399 is an apocalyptic number.

78069340399 is a deficient number, since it is larger than the sum of its proper divisors (1).

78069340399 is an equidigital number, since it uses as much as digits as its factorization.

78069340399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 58.

The spelling of 78069340399 in words is "seventy-eight billion, sixty-nine million, three hundred forty thousand, three hundred ninety-nine".