961557755169 has 32 divisors (see below), whose sum is σ = 1452570088320. Its totient is φ = 560640960000.

The previous prime is 961557755167. The next prime is 961557755231.

961557755169 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 961557755169 - 2¹ = 961557755167 is a prime.

It is a super-2 number, since 2×961557755169² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (961557755161) 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 31 ways as a sum of consecutive naturals, for example, 4315582 + ... + 4532919.

It is an arithmetic number, because the mean of its divisors is an integer number (45392815260).

Almost surely, 2^961557755169 is an apocalyptic number.

It is an amenable number.

961557755169 is a deficient number, since it is larger than the sum of its proper divisors (491012333151).

961557755169 is a wasteful number, since it uses less digits than its factorization.

961557755169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8848641.

The product of its digits is 89302500, while the sum is 66.

The spelling of 961557755169 in words is "nine hundred sixty-one billion, five hundred fifty-seven million, seven hundred fifty-five thousand, one hundred sixty-nine".