1009190910091 has 24 divisors (see below), whose sum is σ = 1267904821680. Its totient is φ = 796179448512.

The previous prime is 1009190909981. The next prime is 1009190910173. The reversal of 1009190910091 is 1900190919001.

It is a de Polignac number, because none of the positive numbers 2^k-1009190910091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1009190914091) 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 23 ways as a sum of consecutive naturals, for example, 2061796 + ... + 2503873.

It is an arithmetic number, because the mean of its divisors is an integer number (52829367570).

Almost surely, 2^{1009190910091} is an apocalyptic number.

1009190910091 is a deficient number, since it is larger than the sum of its proper divisors (258713911589).

1009190910091 is a wasteful number, since it uses less digits than its factorization.

1009190910091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566043 (or 4566036 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 40.

The spelling of 1009190910091 in words is "one trillion, nine billion, one hundred ninety million, nine hundred ten thousand, ninety-one".