1909666189960 has 128 divisors (see below), whose sum is σ = 4699721318400. Its totient is φ = 695679840000.

The previous prime is 1909666189943. The next prime is 1909666189993. The reversal of 1909666189960 is 699816669091.

It is a self number, because there is not a number n which added to its sum of digits gives 1909666189960.

It is an unprimeable number.

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, 3289165 + ... + 3825955.

It is an arithmetic number, because the mean of its divisors is an integer number (36716572800).

Almost surely, 2^{1909666189960} is an apocalyptic number.

1909666189960 is a gapful number since it is divisible by the number (10) 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 1909666189960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2349860659200).

1909666189960 is an abundant number, since it is smaller than the sum of its proper divisors (2790055128440).

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

1909666189960 is a wasteful number, since it uses less digits than its factorization.

1909666189960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537003 (or 536999 counting only the distinct ones).

The product of its (nonzero) digits is 68024448, while the sum is 70.

The spelling of 1909666189960 in words is "one trillion, nine hundred nine billion, six hundred sixty-six million, one hundred eighty-nine thousand, nine hundred sixty".