678245909542875 has 48 divisors (see below), whose sum is σ = 1223470218466080. Its totient is φ = 361488866097600.

The previous prime is 678245909542847. The next prime is 678245909542973. The reversal of 678245909542875 is 578245909542876.

678245909542875 is a `hidden beast` number, since 6 + 7 + 8 + 2 + 459 + 0 + 95 + 4 + 2 + 8 + 75 = 666.

It is not a de Polignac number, because 678245909542875 - 2¹¹ = 678245909540827 is a prime.

It is a Smith number, since the sum of its digits (81) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 678245909542794 and 678245909542803.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 200224345 + ... + 203583594.

It is an arithmetic number, because the mean of its divisors is an integer number (25488962884710).

Almost surely, 2^{678245909542875} is an apocalyptic number.

678245909542875 is a deficient number, since it is larger than the sum of its proper divisors (545224308923205).

678245909542875 is a wasteful number, since it uses less digits than its factorization.

678245909542875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403809453 (or 403809440 counting only the distinct ones).

The product of its (nonzero) digits is 12192768000, while the sum is 81.

Subtracting from 678245909542875 its reverse (578245909542876), we obtain a palindrome (99999999999999).

The spelling of 678245909542875 in words is "six hundred seventy-eight trillion, two hundred forty-five billion, nine hundred nine million, five hundred forty-two thousand, eight hundred seventy-five".