133161497569 has 9 divisors (see below), whose sum is σ = 134530217049. Its totient is φ = 131806575600.

The previous prime is 133161497561. The next prime is 133161497597. The reversal of 133161497569 is 965794161331.

The square root of 133161497569 is 364913.

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

It can be written as a sum of positive squares in 4 ways, for example, as 4073630625 + 129087866944 = 63825^2 + 359288^2 .

It is not a de Polignac number, because 133161497569 - 2³ = 133161497561 is a prime.

It is a super-2 number, since 2×133161497569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133161497561) 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 8 ways as a sum of consecutive naturals, for example, 36854407 + ... + 36858019.

Almost surely, 2^133161497569 is an apocalyptic number.

133161497569 is the 364913-rd square number.

133161497569 is the 182457-th centered octagonal number.

It is an amenable number.

133161497569 is a deficient number, since it is larger than the sum of its proper divisors (1368719480).

133161497569 is an frugal number, since it uses more digits than its factorization.

133161497569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428 (or 3714 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 55.

The spelling of 133161497569 in words is "one hundred thirty-three billion, one hundred sixty-one million, four hundred ninety-seven thousand, five hundred sixty-nine".