779871364819 has 2 divisors, whose sum is σ = 779871364820. Its totient is φ = 779871364818.

The previous prime is 779871364817. The next prime is 779871364837. The reversal of 779871364819 is 918463178977.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 779871364819 - 2¹ = 779871364817 is a prime.

It is a super-2 number, since 2×779871364819² (a number of 25 digits) contains 22 as substring.

Together with 779871364817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (779871364817) 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, 389935682409 + 389935682410.

It is an arithmetic number, because the mean of its divisors is an integer number (389935682410).

Almost surely, 2^779871364819 is an apocalyptic number.

779871364819 is a deficient number, since it is larger than the sum of its proper divisors (1).

779871364819 is an equidigital number, since it uses as much as digits as its factorization.

779871364819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128024064, while the sum is 70.

The spelling of 779871364819 in words is "seven hundred seventy-nine billion, eight hundred seventy-one million, three hundred sixty-four thousand, eight hundred nineteen".