9645955509091 has 48 divisors (see below), whose sum is σ = 10809274845600. Its totient is φ = 8599997120000.

The previous prime is 9645955509079. The next prime is 9645955509107. The reversal of 9645955509091 is 1909055595469.

It is not a de Polignac number, because 9645955509091 - 2⁵ = 9645955509059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9645955509031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 910935825 + ... + 910946413.

It is an arithmetic number, because the mean of its divisors is an integer number (225193225950).

Almost surely, 2^{9645955509091} is an apocalyptic number.

9645955509091 is a deficient number, since it is larger than the sum of its proper divisors (1163319336509).

9645955509091 is a wasteful number, since it uses less digits than its factorization.

9645955509091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11412 (or 11401 counting only the distinct ones).

The product of its (nonzero) digits is 98415000, while the sum is 67.

The spelling of 9645955509091 in words is "nine trillion, six hundred forty-five billion, nine hundred fifty-five million, five hundred nine thousand, ninety-one".