78331840619 has 2 divisors, whose sum is σ = 78331840620. Its totient is φ = 78331840618.

The previous prime is 78331840603. The next prime is 78331840667. The reversal of 78331840619 is 91604813387.

It is a weak prime.

It is an emirp because it is prime and its reverse (91604813387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78331840619 - 2⁴ = 78331840603 is a prime.

It is a super-2 number, since 2×78331840619² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78331890619) 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, 39165920309 + 39165920310.

It is an arithmetic number, because the mean of its divisors is an integer number (39165920310).

Almost surely, 2^78331840619 is an apocalyptic number.

78331840619 is a deficient number, since it is larger than the sum of its proper divisors (1).

78331840619 is an equidigital number, since it uses as much as digits as its factorization.

78331840619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 78331840619 in words is "seventy-eight billion, three hundred thirty-one million, eight hundred forty thousand, six hundred nineteen".