1993139666328 has 32 divisors (see below), whose sum is σ = 5275957941360. Its totient is φ = 625298718720.

The previous prime is 1993139666317. The next prime is 1993139666363. The reversal of 1993139666328 is 8236669313991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2442572713 + ... + 2442573528.

Almost surely, 2^{1993139666328} is an apocalyptic number.

It is an amenable number.

1993139666328 is an abundant number, since it is smaller than the sum of its proper divisors (3282818275032).

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

1993139666328 is a wasteful number, since it uses less digits than its factorization.

1993139666328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885146267 (or 4885146263 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 66.

The spelling of 1993139666328 in words is "one trillion, nine hundred ninety-three billion, one hundred thirty-nine million, six hundred sixty-six thousand, three hundred twenty-eight".