1993223757798 has 192 divisors, whose sum is σ = 5461103531520. Its totient is φ = 511445477376.

The previous prime is 1993223757769. The next prime is 1993223757809. The reversal of 1993223757798 is 8977573223991.

1993223757798 is a `hidden beast` number, since 19 + 9 + 3 + 2 + 2 + 37 + 577 + 9 + 8 = 666.

It is a congruent 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, 9267961 + ... + 9480587.

It is an arithmetic number, because the mean of its divisors is an integer number (28443247560).

Almost surely, 2^{1993223757798} is an apocalyptic number.

1993223757798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1993223757798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2730551765760).

1993223757798 is an abundant number, since it is smaller than the sum of its proper divisors (3467879773722).

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

1993223757798 is a wasteful number, since it uses less digits than its factorization.

1993223757798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212811 (or 212808 counting only the distinct ones).

The product of its digits is 360067680, while the sum is 72.

The spelling of 1993223757798 in words is "one trillion, nine hundred ninety-three billion, two hundred twenty-three million, seven hundred fifty-seven thousand, seven hundred ninety-eight".