878441216077 has 2 divisors, whose sum is σ = 878441216078. Its totient is φ = 878441216076.

The previous prime is 878441216071. The next prime is 878441216137. The reversal of 878441216077 is 770612144878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 836454747241 + 41986468836 = 914579^2 + 204906^2 .

It is a cyclic number.

It is not a de Polignac number, because 878441216077 - 2³ = 878441216069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878441216071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439220608038 + 439220608039.

It is an arithmetic number, because the mean of its divisors is an integer number (439220608039).

Almost surely, 2^878441216077 is an apocalyptic number.

It is an amenable number.

878441216077 is a deficient number, since it is larger than the sum of its proper divisors (1).

878441216077 is an equidigital number, since it uses as much as digits as its factorization.

878441216077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4214784, while the sum is 55.

The spelling of 878441216077 in words is "eight hundred seventy-eight billion, four hundred forty-one million, two hundred sixteen thousand, seventy-seven".