678021993000 has 192 divisors, whose sum is σ = 2500052368320. Its totient is φ = 164368944000.

The previous prime is 678021992957. The next prime is 678021993073. The reversal of 678021993000 is 399120876.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3325354 + ... + 3523353.

It is an arithmetic number, because the mean of its divisors is an integer number (13021106085).

Almost surely, 2^678021993000 is an apocalyptic number.

678021993000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678021993000 is an abundant number, since it is smaller than the sum of its proper divisors (1822030375320).

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

678021993000 is a wasteful number, since it uses less digits than its factorization.

678021993000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6848745 (or 6848728 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 678021993000 in words is "six hundred seventy-eight billion, twenty-one million, nine hundred ninety-three thousand".