78849830519 has 2 divisors, whose sum is σ = 78849830520. Its totient is φ = 78849830518.

The previous prime is 78849830509. The next prime is 78849830531. The reversal of 78849830519 is 91503894887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78849830519 - 2⁸ = 78849830263 is a prime.

It is a super-2 number, since 2×78849830519² (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 (78849830509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39424915259 + 39424915260.

It is an arithmetic number, because the mean of its divisors is an integer number (39424915260).

Almost surely, 2^78849830519 is an apocalyptic number.

78849830519 is a deficient number, since it is larger than the sum of its proper divisors (1).

78849830519 is an equidigital number, since it uses as much as digits as its factorization.

78849830519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 62.

The spelling of 78849830519 in words is "seventy-eight billion, eight hundred forty-nine million, eight hundred thirty thousand, five hundred nineteen".