671794318650 has 192 divisors, whose sum is σ = 2055028969728. Its totient is φ = 141429749760.

The previous prime is 671794318609. The next prime is 671794318667. The reversal of 671794318650 is 56813497176.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6184204 + ... + 6291896.

It is an arithmetic number, because the mean of its divisors is an integer number (10703275884).

Almost surely, 2^671794318650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671794318650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027514484864).

671794318650 is an abundant number, since it is smaller than the sum of its proper divisors (1383234651078).

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

671794318650 is a wasteful number, since it uses less digits than its factorization.

671794318650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108185 (or 108180 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 671794318650 in words is "six hundred seventy-one billion, seven hundred ninety-four million, three hundred eighteen thousand, six hundred fifty".