678484984804 has 27 divisors (see below), whose sum is σ = 1305137174313. Its totient is φ = 308394028800.

The previous prime is 678484984763. The next prime is 678484984829. The reversal of 678484984804 is 408489484876.

The square root of 678484984804 is 823702.

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

It can be written as a sum of positive squares in only one way, i.e., 362281202404 + 316203782400 = 601898^2 + 562320^2 .

It is a super-2 number, since 2×678484984804² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 18102724 + ... + 18140164.

Almost surely, 2^678484984804 is an apocalyptic number.

678484984804 is the 823702-nd square number.

It is an amenable number.

678484984804 is a deficient number, since it is larger than the sum of its proper divisors (626652189509).

678484984804 is an frugal number, since it uses more digits than its factorization.

678484984804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74908 (or 37454 counting only the distinct ones).

The product of its (nonzero) digits is 396361728, while the sum is 70.

The spelling of 678484984804 in words is "six hundred seventy-eight billion, four hundred eighty-four million, nine hundred eighty-four thousand, eight hundred four".