9045918081 has 40 divisors (see below), whose sum is σ = 13689383400. Its totient is φ = 5952165120.

The previous prime is 9045918029. The next prime is 9045918083. The reversal of 9045918081 is 1808195409.

It can be written as a sum of positive squares in 4 ways, for example, as 2915028081 + 6130890000 = 53991^2 + 78300^2 .

It is not a de Polignac number, because 9045918081 - 2¹⁸ = 9045655937 is a prime.

It is a super-2 number, since 2×9045918081² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9045918083) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7359775 + ... + 7361003.

It is an arithmetic number, because the mean of its divisors is an integer number (342234585).

Almost surely, 2^9045918081 is an apocalyptic number.

It is an amenable number.

9045918081 is a deficient number, since it is larger than the sum of its proper divisors (4643465319).

9045918081 is a wasteful number, since it uses less digits than its factorization.

9045918081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 9045918081 is about 95110.0314425350. The cubic root of 9045918081 is about 2083.6153593294.

The spelling of 9045918081 in words is "nine billion, forty-five million, nine hundred eighteen thousand, eighty-one".