78805123685568 has 168 divisors, whose sum is σ = 262002299699712. Its totient is φ = 22179693583872.

The previous prime is 78805123685531. The next prime is 78805123685599. The reversal of 78805123685568 is 86558632150887.

78805123685568 is a `hidden beast` number, since 7 + 8 + 8 + 0 + 5 + 1 + 2 + 3 + 68 + 556 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 78805123685496 and 78805123685505.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145587480 + ... + 146127767.

Almost surely, 2^{78805123685568} is an apocalyptic number.

It is an amenable number.

78805123685568 is an abundant number, since it is smaller than the sum of its proper divisors (183197176014144).

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

78805123685568 is a wasteful number, since it uses less digits than its factorization.

78805123685568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291715339 (or 291715326 counting only the distinct ones).

The product of its (nonzero) digits is 774144000, while the sum is 72.

The spelling of 78805123685568 in words is "seventy-eight trillion, eight hundred five billion, one hundred twenty-three million, six hundred eighty-five thousand, five hundred sixty-eight".