78776663824 has 20 divisors (see below), whose sum is σ = 157553328640. Its totient is φ = 38117740320.

The previous prime is 78776663803. The next prime is 78776663839. The reversal of 78776663824 is 42836667787.

78776663824 is an admirable 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, 79411464 + ... + 79412455.

It is an arithmetic number, because the mean of its divisors is an integer number (7877666432).

Almost surely, 2^78776663824 is an apocalyptic number.

It is an amenable number.

78776663824 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78776663824 is a wasteful number, since it uses less digits than its factorization.

78776663824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158823958 (or 158823952 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 64.

The spelling of 78776663824 in words is "seventy-eight billion, seven hundred seventy-six million, six hundred sixty-three thousand, eight hundred twenty-four".