1993722666624 has 192 divisors, whose sum is σ = 6212988381600. Its totient is φ = 610025195520.

The previous prime is 1993722666583. The next prime is 1993722666629. The reversal of 1993722666624 is 4266662273991.

It is a tau number, because it is divible by the number of its divisors (192).

It is not an unprimeable number, because it can be changed into a prime (1993722666629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2308839 + ... + 3052569.

Almost surely, 2^{1993722666624} 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 1993722666624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3106494190800).

1993722666624 is an abundant number, since it is smaller than the sum of its proper divisors (4219265714976).

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

1993722666624 is a wasteful number, since it uses less digits than its factorization.

1993722666624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743943 (or 743928 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 1993722666624 in words is "one trillion, nine hundred ninety-three billion, seven hundred twenty-two million, six hundred sixty-six thousand, six hundred twenty-four".