77856416268 has 12 divisors (see below), whose sum is σ = 181664971320. Its totient is φ = 25952138752.

The previous prime is 77856416191. The next prime is 77856416291. The reversal of 77856416268 is 86261465877.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3244017333 + ... + 3244017356.

It is an arithmetic number, because the mean of its divisors is an integer number (15138747610).

Almost surely, 2^77856416268 is an apocalyptic number.

It is an amenable number.

77856416268 is an abundant number, since it is smaller than the sum of its proper divisors (103808555052).

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

77856416268 is a wasteful number, since it uses less digits than its factorization.

77856416268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6488034696 (or 6488034694 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 60.

The spelling of 77856416268 in words is "seventy-seven billion, eight hundred fifty-six million, four hundred sixteen thousand, two hundred sixty-eight".