768778877867 has 32 divisors (see below), whose sum is σ = 1038314565120. Its totient is φ = 552967702560.

The previous prime is 768778877851. The next prime is 768778877887.

It is a happy number.

768778877867 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 768778877867 - 2⁴ = 768778877851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (768778877887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2103053 + ... + 2441390.

It is an arithmetic number, because the mean of its divisors is an integer number (32447330160).

Almost surely, 2^768778877867 is an apocalyptic number.

768778877867 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

768778877867 is a deficient number, since it is larger than the sum of its proper divisors (269535687253).

768778877867 is a wasteful number, since it uses less digits than its factorization.

768778877867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544500 (or 4544474 counting only the distinct ones).

The product of its digits is 17348050944, while the sum is 86.

The spelling of 768778877867 in words is "seven hundred sixty-eight billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred sixty-seven".