1009191919191 has 16 divisors (see below), whose sum is σ = 1350347303424. Its totient is φ = 670417189344.

The previous prime is 1009191919069. The next prime is 1009191919199. The reversal of 1009191919191 is 1919191919001.

It is not a de Polignac number, because 1009191919191 - 2¹⁰ = 1009191918167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009191919199) 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 15 ways as a sum of consecutive naturals, for example, 2316846 + ... + 2717748.

It is an arithmetic number, because the mean of its divisors is an integer number (84396706464).

Almost surely, 2^{1009191919191} is an apocalyptic number.

1009191919191 is a deficient number, since it is larger than the sum of its proper divisors (341155384233).

1009191919191 is a wasteful number, since it uses less digits than its factorization.

1009191919191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403870.

The product of its (nonzero) digits is 59049, while the sum is 51.

The spelling of 1009191919191 in words is "one trillion, nine billion, one hundred ninety-one million, nine hundred nineteen thousand, one hundred ninety-one".