77982419089 has 2 divisors, whose sum is σ = 77982419090. Its totient is φ = 77982419088.

The previous prime is 77982419029. The next prime is 77982419111. The reversal of 77982419089 is 98091428977.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61252290064 + 16730129025 = 247492^2 + 129345^2 .

It is a cyclic number.

It is not a de Polignac number, because 77982419089 - 2¹⁷ = 77982288017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77982419089.

It is not a weakly prime, because it can be changed into another prime (77982419029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38991209544 + 38991209545.

It is an arithmetic number, because the mean of its divisors is an integer number (38991209545).

Almost surely, 2^77982419089 is an apocalyptic number.

It is an amenable number.

77982419089 is a deficient number, since it is larger than the sum of its proper divisors (1).

77982419089 is an equidigital number, since it uses as much as digits as its factorization.

77982419089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18289152, while the sum is 64.

The spelling of 77982419089 in words is "seventy-seven billion, nine hundred eighty-two million, four hundred nineteen thousand, eighty-nine".