867878787878 has 8 divisors (see below), whose sum is σ = 1301839477272. Its totient is φ = 433932295456.

The previous prime is 867878787869. The next prime is 867878787907. The reversal of 867878787878 is 878787878768.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 867878787793 and 867878787802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3395075 + ... + 3641742.

It is an arithmetic number, because the mean of its divisors is an integer number (162729934659).

Almost surely, 2^867878787878 is an apocalyptic number.

867878787878 is a deficient number, since it is larger than the sum of its proper divisors (433960689394).

867878787878 is a wasteful number, since it uses less digits than its factorization.

867878787878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7098486.

The product of its digits is 26435125248, while the sum is 89.

The spelling of 867878787878 in words is "eight hundred sixty-seven billion, eight hundred seventy-eight million, seven hundred eighty-seven thousand, eight hundred seventy-eight".