77717421649068 has 24 divisors (see below), whose sum is σ = 183136102502640. Its totient is φ = 25649314075200.

The previous prime is 77717421649039. The next prime is 77717421649103. The reversal of 77717421649068 is 86094612471777.

It is a junction number, because it is equal to n+sod(n) for n = 77717421648993 and 77717421649011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32061641383 + ... + 32061643806.

It is an arithmetic number, because the mean of its divisors is an integer number (7630670937610).

Almost surely, 2^{77717421649068} is an apocalyptic number.

It is an amenable number.

77717421649068 is an abundant number, since it is smaller than the sum of its proper divisors (105418680853572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77717421649068 is a wasteful number, since it uses less digits than its factorization.

77717421649068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64123285297 (or 64123285295 counting only the distinct ones).

The product of its (nonzero) digits is 199148544, while the sum is 69.

The spelling of 77717421649068 in words is "seventy-seven trillion, seven hundred seventeen billion, four hundred twenty-one million, six hundred forty-nine thousand, sixty-eight".