77443162568 has 12 divisors (see below), whose sum is σ = 145207405665. Its totient is φ = 38721187728.

The previous prime is 77443162493. The next prime is 77443162639. The reversal of 77443162568 is 86526134477.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 46698345604 + 30744816964 = 216098^2 + 175342^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=196778.

It is a Duffinian number.

It is an unprimeable number.

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 in 2 ways as a sum of consecutive naturals, for example, 737918 + ... + 836306.

Almost surely, 2^77443162568 is an apocalyptic number.

It is an amenable number.

77443162568 is a deficient number, since it is larger than the sum of its proper divisors (67764243097).

77443162568 is an frugal number, since it uses more digits than its factorization.

77443162568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196784 (or 98391 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 53.

The spelling of 77443162568 in words is "seventy-seven billion, four hundred forty-three million, one hundred sixty-two thousand, five hundred sixty-eight".