678202321608 has 576 divisors, whose sum is σ = 2374025472000. Its totient is φ = 177186610944.

The previous prime is 678202321547. The next prime is 678202321619. The reversal of 678202321608 is 806123202876.

678202321608 is a `hidden beast` number, since 6 + 7 + 8 + 2 + 0 + 2 + 32 + 1 + 608 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 217440673 + ... + 217443791.

It is an arithmetic number, because the mean of its divisors is an integer number (4121572000).

Almost surely, 2^678202321608 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 678202321608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187012736000).

678202321608 is an abundant number, since it is smaller than the sum of its proper divisors (1695823150392).

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

678202321608 is a wasteful number, since it uses less digits than its factorization.

678202321608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 3179 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 678202321608 in words is "six hundred seventy-eight billion, two hundred two million, three hundred twenty-one thousand, six hundred eight".