9091009191919 has 8 divisors (see below), whose sum is σ = 9236237529728. Its totient is φ = 8946061490520.

The previous prime is 9091009191917. The next prime is 9091009191973. The reversal of 9091009191919 is 9191919001909.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9091009191919 - 2¹ = 9091009191917 is a prime.

It is a super-2 number, since 2×9091009191919² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9091009191917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70093797 + ... + 70223374.

It is an arithmetic number, because the mean of its divisors is an integer number (1154529691216).

Almost surely, 2^{9091009191919} is an apocalyptic number.

9091009191919 is a deficient number, since it is larger than the sum of its proper divisors (145228337809).

9091009191919 is a wasteful number, since it uses less digits than its factorization.

9091009191919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140318205.

The product of its (nonzero) digits is 531441, while the sum is 58.

The spelling of 9091009191919 in words is "nine trillion, ninety-one billion, nine million, one hundred ninety-one thousand, nine hundred nineteen".