9491806749 has 32 divisors (see below), whose sum is σ = 13366944000. Its totient is φ = 5982609920.

The previous prime is 9491806747. The next prime is 9491806771. The reversal of 9491806749 is 9476081949.

9491806749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9491806749 - 2¹ = 9491806747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9491806747) 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 31 ways as a sum of consecutive naturals, for example, 915217 + ... + 925529.

It is an arithmetic number, because the mean of its divisors is an integer number (417717000).

Almost surely, 2^9491806749 is an apocalyptic number.

It is an amenable number.

9491806749 is a deficient number, since it is larger than the sum of its proper divisors (3875137251).

9491806749 is a wasteful number, since it uses less digits than its factorization.

9491806749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The square root of 9491806749 is about 97425.9038911110. The cubic root of 9491806749 is about 2117.3027544480.

The spelling of 9491806749 in words is "nine billion, four hundred ninety-one million, eight hundred six thousand, seven hundred forty-nine".