1669818468864 has 1080 divisors, whose sum is σ = 5817611032992. Its totient is φ = 424091566080.

The previous prime is 1669818468853. The next prime is 1669818468919. The reversal of 1669818468864 is 4688648189661.

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 107 ways as a sum of consecutive naturals, for example, 23518569949 + ... + 23518570019.

Almost surely, 2^{1669818468864} is an apocalyptic number.

1669818468864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1669818468864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2908805516496).

1669818468864 is an abundant number, since it is smaller than the sum of its proper divisors (4147792564128).

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

1669818468864 is an equidigital number, since it uses as much as digits as its factorization.

1669818468864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 139 counting only the distinct ones).

The product of its digits is 764411904, while the sum is 75.

The spelling of 1669818468864 in words is "one trillion, six hundred sixty-nine billion, eight hundred eighteen million, four hundred sixty-eight thousand, eight hundred sixty-four".