78865284388 has 12 divisors (see below), whose sum is σ = 150560997552. Its totient is φ = 35847856520.

The previous prime is 78865284359. The next prime is 78865284391. The reversal of 78865284388 is 88348256887.

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, 896196370 + ... + 896196457.

It is an arithmetic number, because the mean of its divisors is an integer number (12546749796).

Almost surely, 2^78865284388 is an apocalyptic number.

It is an amenable number.

78865284388 is a deficient number, since it is larger than the sum of its proper divisors (71695713164).

78865284388 is a wasteful number, since it uses less digits than its factorization.

78865284388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792392842 (or 1792392840 counting only the distinct ones).

The product of its digits is 165150720, while the sum is 67.

The spelling of 78865284388 in words is "seventy-eight billion, eight hundred sixty-five million, two hundred eighty-four thousand, three hundred eighty-eight".