86778576719 has 2 divisors, whose sum is σ = 86778576720. Its totient is φ = 86778576718.

The previous prime is 86778576713. The next prime is 86778576721. The reversal of 86778576719 is 91767587768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86778576719 - 2³² = 82483609423 is a prime.

It is a super-2 number, since 2×86778576719² (a number of 23 digits) contains 22 as substring.

Together with 86778576721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86778576713) 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, 43389288359 + 43389288360.

It is an arithmetic number, because the mean of its divisors is an integer number (43389288360).

Almost surely, 2^86778576719 is an apocalyptic number.

86778576719 is a deficient number, since it is larger than the sum of its proper divisors (1).

86778576719 is an equidigital number, since it uses as much as digits as its factorization.

86778576719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248935680, while the sum is 71.

The spelling of 86778576719 in words is "eighty-six billion, seven hundred seventy-eight million, five hundred seventy-six thousand, seven hundred nineteen".