777777777768 has 32 divisors (see below), whose sum is σ = 1944497489760. Its totient is φ = 259252186560.

The previous prime is 777777777739. The next prime is 777777777769. The reversal of 777777777768 is 867777777777.

It is not an unprimeable number, because it can be changed into a prime (777777777769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496723 + ... + 1342493.

It is an arithmetic number, because the mean of its divisors is an integer number (60765546555).

Almost surely, 2^777777777768 is an apocalyptic number.

It is an amenable number.

777777777768 is an abundant number, since it is smaller than the sum of its proper divisors (1166719711992).

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

777777777768 is a wasteful number, since it uses less digits than its factorization.

777777777768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884097 (or 884093 counting only the distinct ones).

The product of its digits is 13558811952, while the sum is 84.

Subtracting 777777777768 from its reverse (867777777777), we obtain a palindrome (90000000009).

The spelling of 777777777768 in words is "seven hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, seven hundred sixty-eight".