78887876868 has 36 divisors (see below), whose sum is σ = 200444257468. Its totient is φ = 26159708160.

The previous prime is 78887876867. The next prime is 78887876869. The reversal of 78887876868 is 86867878887.

It is an interprime number because it is at equal distance from previous prime (78887876867) and next prime (78887876869).

It can be written as a sum of positive squares in 2 ways, for example, as 45502009344 + 33385867524 = 213312^2 + 182718^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (78887876867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5670073 + ... + 5683968.

Almost surely, 2^78887876868 is an apocalyptic number.

It is an amenable number.

78887876868 is an abundant number, since it is smaller than the sum of its proper divisors (121556380600).

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

78887876868 is a wasteful number, since it uses less digits than its factorization.

78887876868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11354244 (or 11354239 counting only the distinct ones).

The product of its digits is 3236954112, while the sum is 81.

The spelling of 78887876868 in words is "seventy-eight billion, eight hundred eighty-seven million, eight hundred seventy-six thousand, eight hundred sixty-eight".