678856322736 has 600 divisors, whose sum is σ = 2179589068800. Its totient is φ = 203205542400.

The previous prime is 678856322687. The next prime is 678856322737. The reversal of 678856322736 is 637223658876.

678856322736 is a `hidden beast` number, since 67 + 8 + 8 + 563 + 2 + 2 + 7 + 3 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (678856322737) by changing a digit.

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 119 ways as a sum of consecutive naturals, for example, 2840402905 + ... + 2840403143.

It is an arithmetic number, because the mean of its divisors is an integer number (3632648448).

Almost surely, 2^678856322736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678856322736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089794534400).

678856322736 is an abundant number, since it is smaller than the sum of its proper divisors (1500732746064).

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

678856322736 is a wasteful number, since it uses less digits than its factorization.

678856322736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 355 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 63.

The spelling of 678856322736 in words is "six hundred seventy-eight billion, eight hundred fifty-six million, three hundred twenty-two thousand, seven hundred thirty-six".