9391485089809 has 9 divisors (see below), whose sum is σ = 9460959397617. Its totient is φ = 9322517324544.

The previous prime is 9391485089797. The next prime is 9391485089881. The reversal of 9391485089809 is 9089805841939.

The square root of 9391485089809 is 3064553.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 21323300625 + 9370161789184 = 146025^2 + 3061072^2 .

It is not a de Polignac number, because 9391485089809 - 2²⁷ = 9391350872081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9391185089809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 419832577 + ... + 419854945.

Almost surely, 2^{9391485089809} is an apocalyptic number.

9391485089809 is the 3064553-rd square number.

9391485089809 is the 1532277-th centered octagonal number.

It is an amenable number.

9391485089809 is a deficient number, since it is larger than the sum of its proper divisors (69474307808).

9391485089809 is an frugal number, since it uses more digits than its factorization.

9391485089809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45012 (or 22506 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 73.

The spelling of 9391485089809 in words is "nine trillion, three hundred ninety-one billion, four hundred eighty-five million, eighty-nine thousand, eight hundred nine".