678503965824 has 512 divisors, whose sum is σ = 2129736499200. Its totient is φ = 212328345600.

The previous prime is 678503965787. The next prime is 678503965837. The reversal of 678503965824 is 428569305876.

It is a happy number.

678503965824 is a `hidden beast` number, since 6 + 78 + 503 + 9 + 6 + 58 + 2 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 639494254 + ... + 639495314.

It is an arithmetic number, because the mean of its divisors is an integer number (4159641600).

Almost surely, 2^678503965824 is an apocalyptic number.

678503965824 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678503965824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1064868249600).

678503965824 is an abundant number, since it is smaller than the sum of its proper divisors (1451232533376).

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

678503965824 is a wasteful number, since it uses less digits than its factorization.

678503965824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289 (or 1271 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 678503965824 in words is "six hundred seventy-eight billion, five hundred three million, nine hundred sixty-five thousand, eight hundred twenty-four".