867128821768 has 16 divisors (see below), whose sum is σ = 1773672590160. Its totient is φ = 394149464400.

The previous prime is 867128821729. The next prime is 867128821781.

867128821768 is nontrivially palindromic in base 10.

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, 4926868218 + ... + 4926868393.

It is an arithmetic number, because the mean of its divisors is an integer number (110854536885).

Almost surely, 2^867128821768 is an apocalyptic number.

867128821768 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

867128821768 is an abundant number, since it is smaller than the sum of its proper divisors (906543768392).

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

867128821768 is a wasteful number, since it uses less digits than its factorization.

867128821768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9853736628 (or 9853736624 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 64.

The spelling of 867128821768 in words is "eight hundred sixty-seven billion, one hundred twenty-eight million, eight hundred twenty-one thousand, seven hundred sixty-eight".