78345328727719 has 2 divisors, whose sum is σ = 78345328727720. Its totient is φ = 78345328727718.

The previous prime is 78345328727707. The next prime is 78345328727741. The reversal of 78345328727719 is 91772782354387.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78345328727719 - 2⁹ = 78345328727207 is a prime.

It is a super-2 number, since 2×78345328727719² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78345328127719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39172664363859 + 39172664363860.

It is an arithmetic number, because the mean of its divisors is an integer number (39172664363860).

Almost surely, 2^{78345328727719} is an apocalyptic number.

78345328727719 is a deficient number, since it is larger than the sum of its proper divisors (1).

78345328727719 is an equidigital number, since it uses as much as digits as its factorization.

78345328727719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995742720, while the sum is 73.

The spelling of 78345328727719 in words is "seventy-eight trillion, three hundred forty-five billion, three hundred twenty-eight million, seven hundred twenty-seven thousand, seven hundred nineteen".