9391105089081 has 45 divisors (see below), whose sum is σ = 14806726694463. Its totient is φ = 5930893301760.

The previous prime is 9391105089011. The next prime is 9391105089181. The reversal of 9391105089081 is 1809805011939.

The square root of 9391105089081 is 3064491.

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

9391105089081 is a `hidden beast` number, since 9 + 39 + 1 + 10 + 508 + 90 + 8 + 1 = 666.

9391105089081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 126386649081 + 9264718440000 = 355509^2 + 3043800^2 .

It is not a de Polignac number, because 9391105089081 - 2³³ = 9382515154489 is a prime.

It is a super-2 number, since 2×9391105089081² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9391105089011) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 524019001 + ... + 524036921.

Almost surely, 2^{9391105089081} is an apocalyptic number.

9391105089081 is the 3064491-st square number.

9391105089081 is the 1532246-th centered octagonal number.

It is an amenable number.

9391105089081 is a deficient number, since it is larger than the sum of its proper divisors (5415621605382).

9391105089081 is an frugal number, since it uses more digits than its factorization.

9391105089081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35892 (or 17943 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 54.

The spelling of 9391105089081 in words is "nine trillion, three hundred ninety-one billion, one hundred five million, eighty-nine thousand, eighty-one".