86224778789 has 2 divisors, whose sum is σ = 86224778790. Its totient is φ = 86224778788.

The previous prime is 86224778779. The next prime is 86224778791. The reversal of 86224778789 is 98787742268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85946889889 + 277888900 = 293167^2 + 16670^2 .

It is a cyclic number.

It is not a de Polignac number, because 86224778789 - 2¹² = 86224774693 is a prime.

Together with 86224778791, 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 (86224778749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43112389394 + 43112389395.

It is an arithmetic number, because the mean of its divisors is an integer number (43112389395).

Almost surely, 2^86224778789 is an apocalyptic number.

It is an amenable number.

86224778789 is a deficient number, since it is larger than the sum of its proper divisors (1).

86224778789 is an equidigital number, since it uses as much as digits as its factorization.

86224778789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151732224, while the sum is 68.

The spelling of 86224778789 in words is "eighty-six billion, two hundred twenty-four million, seven hundred seventy-eight thousand, seven hundred eighty-nine".