9086481981 has 24 divisors (see below), whose sum is σ = 13362835200. Its totient is φ = 5948186400.

The previous prime is 9086481979. The next prime is 9086481991. The reversal of 9086481981 is 1891846809.

9086481981 is a `hidden beast` number, since 9 + 0 + 86 + 481 + 9 + 81 = 666.

It is not a de Polignac number, because 9086481981 - 2¹ = 9086481979 is a prime.

It is a super-2 number, since 2×9086481981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9086481991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 315036 + ... + 342666.

It is an arithmetic number, because the mean of its divisors is an integer number (556784800).

Almost surely, 2^9086481981 is an apocalyptic number.

It is an amenable number.

9086481981 is a deficient number, since it is larger than the sum of its proper divisors (4276353219).

9086481981 is a wasteful number, since it uses less digits than its factorization.

9086481981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28297 (or 28294 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 9086481981 is about 95323.0401372092. The cubic root of 9086481981 is about 2086.7251798140.

The spelling of 9086481981 in words is "nine billion, eighty-six million, four hundred eighty-one thousand, nine hundred eighty-one".