1909164309868 has 24 divisors (see below), whose sum is σ = 3345363123200. Its totient is φ = 953346567888.

The previous prime is 1909164309863. The next prime is 1909164309893. The reversal of 1909164309868 is 8689034619091.

It is not an unprimeable number, because it can be changed into a prime (1909164309863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29926621 + ... + 29990347.

Almost surely, 2^{1909164309868} is an apocalyptic number.

It is an amenable number.

1909164309868 is a deficient number, since it is larger than the sum of its proper divisors (1436198813332).

1909164309868 is a wasteful number, since it uses less digits than its factorization.

1909164309868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73309 (or 73307 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 64.

The spelling of 1909164309868 in words is "one trillion, nine hundred nine billion, one hundred sixty-four million, three hundred nine thousand, eight hundred sixty-eight".