9664941261 has 16 divisors (see below), whose sum is σ = 13603285440. Its totient is φ = 6086868480.

The previous prime is 9664941257. The next prime is 9664941277. The reversal of 9664941261 is 1621494669.

It is not a de Polignac number, because 9664941261 - 2² = 9664941257 is a prime.

It is a super-2 number, since 2×9664941261² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9664941261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664941211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220050 + ... + 260291.

It is an arithmetic number, because the mean of its divisors is an integer number (850205340).

Almost surely, 2^9664941261 is an apocalyptic number.

It is an amenable number.

9664941261 is a deficient number, since it is larger than the sum of its proper divisors (3938344179).

9664941261 is a wasteful number, since it uses less digits than its factorization.

9664941261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480716.

The product of its digits is 559872, while the sum is 48.

The square root of 9664941261 is about 98310.4331238552. The cubic root of 9664941261 is about 2130.0987604365.

The spelling of 9664941261 in words is "nine billion, six hundred sixty-four million, nine hundred forty-one thousand, two hundred sixty-one".