9091000000919 has 4 divisors (see below), whose sum is σ = 9200530121496. Its totient is φ = 8981469880344.

The previous prime is 9091000000891. The next prime is 9091000000969. The reversal of 9091000000919 is 9190000001909.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9091000000919 - 2¹⁶ = 9090999935383 is a prime.

It is a super-2 number, since 2×9091000000919² (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 (9091000000969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54765060164 + ... + 54765060329.

It is an arithmetic number, because the mean of its divisors is an integer number (2300132530374).

Almost surely, 2^{9091000000919} is an apocalyptic number.

9091000000919 is a deficient number, since it is larger than the sum of its proper divisors (109530120577).

9091000000919 is a wasteful number, since it uses less digits than its factorization.

9091000000919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109530120576.

The product of its (nonzero) digits is 6561, while the sum is 38.

The spelling of 9091000000919 in words is "nine trillion, ninety-one billion, nine hundred nineteen", and thus it is an aban number.