9645550091 has 8 divisors (see below), whose sum is σ = 9917518464. Its totient is φ = 9374175360.

The previous prime is 9645550039. The next prime is 9645550093. The reversal of 9645550091 is 1900555469.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9645550091 - 2⁶ = 9645550027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9645550093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115355 + ... + 180548.

It is an arithmetic number, because the mean of its divisors is an integer number (1239689808).

Almost surely, 2^9645550091 is an apocalyptic number.

9645550091 is a deficient number, since it is larger than the sum of its proper divisors (271968373).

9645550091 is a wasteful number, since it uses less digits than its factorization.

9645550091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296821.

The product of its (nonzero) digits is 243000, while the sum is 44.

The square root of 9645550091 is about 98211.7614697955. The cubic root of 9645550091 is about 2128.6732383375.

The spelling of 9645550091 in words is "nine billion, six hundred forty-five million, five hundred fifty thousand, ninety-one".