9691161241969 has 9 divisors (see below), whose sum is σ = 10036956094347. Its totient is φ = 9356896102344.

The previous prime is 9691161241939. The next prime is 9691161241997. The reversal of 9691161241969 is 9691421611969.

The square root of 9691161241969 is 3113063.

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

It can be written as a sum of positive squares in only one way, i.e., 5081809878369 + 4609351363600 = 2254287^2 + 2146940^2 .

It is not a de Polignac number, because 9691161241969 - 2¹³ = 9691161233777 is a prime.

It is a super-2 number, since 2×9691161241969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9691161241969.

It is not an unprimeable number, because it can be changed into a prime (9691161241939) 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 8 ways as a sum of consecutive naturals, for example, 90225154 + ... + 90332500.

Almost surely, 2^{9691161241969} is an apocalyptic number.

9691161241969 is the 3113063-rd square number.

9691161241969 is the 1556532-nd centered octagonal number.

It is an amenable number.

9691161241969 is a deficient number, since it is larger than the sum of its proper divisors (345794852378).

9691161241969 is an frugal number, since it uses more digits than its factorization.

9691161241969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214752 (or 107376 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 64.

Multiplying 9691161241969 by its sum of digits (64), we get a square (620234319486016 = 24904504²).

The spelling of 9691161241969 in words is "nine trillion, six hundred ninety-one billion, one hundred sixty-one million, two hundred forty-one thousand, nine hundred sixty-nine".