867778877768 has 16 divisors (see below), whose sum is σ = 1775002250160. Its totient is φ = 394444944400.

The previous prime is 867778877759. The next prime is 867778877773.

It is a happy number.

867778877768 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 867778877768.

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, 4930561718 + ... + 4930561893.

It is an arithmetic number, because the mean of its divisors is an integer number (110937640635).

Almost surely, 2^867778877768 is an apocalyptic number.

867778877768 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

867778877768 is an abundant number, since it is smaller than the sum of its proper divisors (907223372392).

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

867778877768 is a wasteful number, since it uses less digits than its factorization.

867778877768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9861123628 (or 9861123624 counting only the distinct ones).

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

The spelling of 867778877768 in words is "eight hundred sixty-seven billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, seven hundred sixty-eight".