1909000000001 has 4 divisors (see below), whose sum is σ = 1924031496192. Its totient is φ = 1893968503812.

The previous prime is 1908999999961. The next prime is 1909000000007. The reversal of 1909000000001 is 1000000009091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1909000000001 - 2²⁶ = 1908932891137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1909000000001.

It is not an unprimeable number, because it can be changed into a prime (1909000000007) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7515747905 + ... + 7515748158.

It is an arithmetic number, because the mean of its divisors is an integer number (481007874048).

Almost surely, 2^{1909000000001} is an apocalyptic number.

It is an amenable number.

1909000000001 is a deficient number, since it is larger than the sum of its proper divisors (15031496191).

1909000000001 is a wasteful number, since it uses less digits than its factorization.

1909000000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15031496190.

The product of its (nonzero) digits is 81, while the sum is 20.

Adding to 1909000000001 its reverse (1000000009091), we get a palindrome (2909000009092).

The spelling of 1909000000001 in words is "one trillion, nine hundred nine billion, one", and thus it is an aban number.