78463221877625 has 16 divisors (see below), whose sum is σ = 105454570205712. Its totient is φ = 57942071539200.

The previous prime is 78463221877577. The next prime is 78463221877631. The reversal of 78463221877625 is 52677812236487.

78463221877625 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 65703523504441 + 12759698373184 = 8105771^2 + 3572072^2 .

It is not a de Polignac number, because 78463221877625 - 2¹⁰ = 78463221876601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24142528184 + ... + 24142531433.

It is an arithmetic number, because the mean of its divisors is an integer number (6590910637857).

Almost surely, 2^{78463221877625} is an apocalyptic number.

It is an amenable number.

78463221877625 is a deficient number, since it is larger than the sum of its proper divisors (26991348328087).

78463221877625 is a wasteful number, since it uses less digits than its factorization.

78463221877625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48285059645 (or 48285059635 counting only the distinct ones).

The product of its digits is 379330560, while the sum is 68.

The spelling of 78463221877625 in words is "seventy-eight trillion, four hundred sixty-three billion, two hundred twenty-one million, eight hundred seventy-seven thousand, six hundred twenty-five".