9641691955 has 16 divisors (see below), whose sum is σ = 13228758720. Its totient is φ = 6608512512.

The previous prime is 9641691947. The next prime is 9641691959. The reversal of 9641691955 is 5591961469.

It is a happy number.

9641691955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9641691955 - 2³ = 9641691947 is a prime.

It is a super-2 number, since 2×9641691955² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9641691896 and 9641691905.

It is not an unprimeable number, because it can be changed into a prime (9641691959) 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, 20431 + ... + 140359.

It is an arithmetic number, because the mean of its divisors is an integer number (826797420).

Almost surely, 2^9641691955 is an apocalyptic number.

9641691955 is a deficient number, since it is larger than the sum of its proper divisors (3587066765).

9641691955 is a wasteful number, since it uses less digits than its factorization.

9641691955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122238.

The product of its digits is 2624400, while the sum is 55.

The square root of 9641691955 is about 98192.1175807916. The cubic root of 9641691955 is about 2128.3893835712.

The spelling of 9641691955 in words is "nine billion, six hundred forty-one million, six hundred ninety-one thousand, nine hundred fifty-five".