78485319919 has 2 divisors, whose sum is σ = 78485319920. Its totient is φ = 78485319918.

The previous prime is 78485319821. The next prime is 78485319943. The reversal of 78485319919 is 91991358487.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78485319919 is a prime.

It is a super-2 number, since 2×78485319919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78485319989) 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, 39242659959 + 39242659960.

It is an arithmetic number, because the mean of its divisors is an integer number (39242659960).

Almost surely, 2^78485319919 is an apocalyptic number.

78485319919 is a deficient number, since it is larger than the sum of its proper divisors (1).

78485319919 is an equidigital number, since it uses as much as digits as its factorization.

78485319919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 64.

The spelling of 78485319919 in words is "seventy-eight billion, four hundred eighty-five million, three hundred nineteen thousand, nine hundred nineteen".