4491532681 has 16 divisors (see below), whose sum is σ = 4663346688. Its totient is φ = 4321497600.

The previous prime is 4491532631. The next prime is 4491532693. The reversal of 4491532681 is 1862351944.

It is a cyclic number.

It is not a de Polignac number, because 4491532681 - 2⁹ = 4491532169 is a prime.

It is a super-2 number, since 2×4491532681² = 40347731648982095522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4491532631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6673561 + ... + 6674233.

It is an arithmetic number, because the mean of its divisors is an integer number (291459168).

Almost surely, 2^4491532681 is an apocalyptic number.

It is an amenable number.

4491532681 is a deficient number, since it is larger than the sum of its proper divisors (171814007).

4491532681 is a wasteful number, since it uses less digits than its factorization.

4491532681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632.

The product of its digits is 207360, while the sum is 43.

The square root of 4491532681 is about 67018.8979393126. The cubic root of 4491532681 is about 1649.9274753553.

The spelling of 4491532681 in words is "four billion, four hundred ninety-one million, five hundred thirty-two thousand, six hundred eighty-one".