878787878768 has 40 divisors (see below), whose sum is σ = 1726004378352. Its totient is φ = 433408255488.

The previous prime is 878787878767. The next prime is 878787878797. The reversal of 878787878768 is 867878787878.

It is a happy number.

It is a super-2 number, since 2×878787878768² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878787878767) 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, 932630 + ... + 1620917.

Almost surely, 2^878787878768 is an apocalyptic number.

It is an amenable number.

878787878768 is a deficient number, since it is larger than the sum of its proper divisors (847216499584).

878787878768 is a wasteful number, since it uses less digits than its factorization.

878787878768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553849 (or 2553843 counting only the distinct ones).

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

The spelling of 878787878768 in words is "eight hundred seventy-eight billion, seven hundred eighty-seven million, eight hundred seventy-eight thousand, seven hundred sixty-eight".