678185351712 has 72 divisors (see below), whose sum is σ = 2103915930480. Its totient is φ = 205510711680.

The previous prime is 678185351639. The next prime is 678185351731. The reversal of 678185351712 is 217153581876.

678185351712 is a `hidden beast` number, since 6 + 7 + 81 + 8 + 535 + 17 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107033662 + ... + 107039997.

It is an arithmetic number, because the mean of its divisors is an integer number (29221054590).

Almost surely, 2^678185351712 is an apocalyptic number.

It is an amenable number.

678185351712 is an abundant number, since it is smaller than the sum of its proper divisors (1425730578768).

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

678185351712 is a wasteful number, since it uses less digits than its factorization.

678185351712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214073686 (or 214073675 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The spelling of 678185351712 in words is "six hundred seventy-eight billion, one hundred eighty-five million, three hundred fifty-one thousand, seven hundred twelve".