678323548816 has 45 divisors (see below), whose sum is σ = 1327122403131. Its totient is φ = 335872300032.

The previous prime is 678323548787. The next prime is 678323548817. The reversal of 678323548816 is 618845323876.

The square root of 678323548816 is 823604.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 22741846416 + 655581702400 = 150804^2 + 809680^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678323548817) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 359090400 + ... + 359092288.

Almost surely, 2^678323548816 is an apocalyptic number.

678323548816 is the 823604-th square number.

It is an amenable number.

678323548816 is a deficient number, since it is larger than the sum of its proper divisors (648798854315).

678323548816 is an frugal number, since it uses more digits than its factorization.

678323548816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004 (or 2000 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 61.

The spelling of 678323548816 in words is "six hundred seventy-eight billion, three hundred twenty-three million, five hundred forty-eight thousand, eight hundred sixteen".