78585873019 has 2 divisors, whose sum is σ = 78585873020. Its totient is φ = 78585873018.

The previous prime is 78585872947. The next prime is 78585873161. The reversal of 78585873019 is 91037858587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78585873019 - 2⁷ = 78585872891 is a prime.

It is a super-2 number, since 2×78585873019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78585870019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39292936509 + 39292936510.

It is an arithmetic number, because the mean of its divisors is an integer number (39292936510).

Almost surely, 2^78585873019 is an apocalyptic number.

78585873019 is a deficient number, since it is larger than the sum of its proper divisors (1).

78585873019 is an equidigital number, since it uses as much as digits as its factorization.

78585873019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16934400, while the sum is 61.

The spelling of 78585873019 in words is "seventy-eight billion, five hundred eighty-five million, eight hundred seventy-three thousand, nineteen".