1668911988192 has 48 divisors (see below), whose sum is σ = 4531959285840. Its totient is φ = 537121098752.

The previous prime is 1668911988137. The next prime is 1668911988253. The reversal of 1668911988192 is 2918891198661.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299729973 + ... + 299735540.

It is an arithmetic number, because the mean of its divisors is an integer number (94415818455).

Almost surely, 2^{1668911988192} is an apocalyptic number.

1668911988192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1668911988192 is an abundant number, since it is smaller than the sum of its proper divisors (2863047297648).

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

1668911988192 is a wasteful number, since it uses less digits than its factorization.

1668911988192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599465555 (or 599465547 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 69.

The spelling of 1668911988192 in words is "one trillion, six hundred sixty-eight billion, nine hundred eleven million, nine hundred eighty-eight thousand, one hundred ninety-two".