1669443572172 has 96 divisors (see below), whose sum is σ = 4011344213184. Its totient is φ = 540142387200.

The previous prime is 1669443572171. The next prime is 1669443572183. The reversal of 1669443572172 is 2712753449661.

It is not an unprimeable number, because it can be changed into a prime (1669443572171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272737272 + ... + 272743392.

It is an arithmetic number, because the mean of its divisors is an integer number (41784835554).

Almost surely, 2^{1669443572172} is an apocalyptic number.

1669443572172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1669443572172 is an abundant number, since it is smaller than the sum of its proper divisors (2341900641012).

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

1669443572172 is a wasteful number, since it uses less digits than its factorization.

1669443572172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10699 (or 10697 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 57.

The spelling of 1669443572172 in words is "one trillion, six hundred sixty-nine billion, four hundred forty-three million, five hundred seventy-two thousand, one hundred seventy-two".