9661709172241 has 9 divisors (see below), whose sum is σ = 11239156388649. Its totient is φ = 8281446354804.

The previous prime is 9661709172239. The next prime is 9661709172257. The reversal of 9661709172241 is 1422719071669.

The square root of 9661709172241 is 3108329.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 9661709172241 - 2¹ = 9661709172239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9661709172211) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21536280 + ... + 21980326.

Almost surely, 2^{9661709172241} is an apocalyptic number.

9661709172241 is the 3108329-th square number.

9661709172241 is the 1554165-th centered octagonal number.

It is an amenable number.

9661709172241 is a deficient number, since it is larger than the sum of its proper divisors (1577447216408).

9661709172241 is an frugal number, since it uses more digits than its factorization.

9661709172241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888108 (or 444054 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 9661709172241 in words is "nine trillion, six hundred sixty-one billion, seven hundred nine million, one hundred seventy-two thousand, two hundred forty-one".