32961491809 has 3 divisors (see below), whose sum is σ = 32961673363. Its totient is φ = 32961310256.

The previous prime is 32961491741. The next prime is 32961491833. The reversal of 32961491809 is 90819416923.

The square root of 32961491809 is 181553.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90819416923 = 23 ⋅3948670301.

It can be written as a sum of positive squares in only one way, i.e., 15819350625 + 17142141184 = 125775^2 + 130928^2 .

It is not a de Polignac number, because 32961491809 - 2⁷ = 32961491681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32961491909) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 90777 + ... + 272329.

Almost surely, 2^32961491809 is an apocalyptic number.

32961491809 is the 181553-rd square number.

32961491809 is the 90777-th centered octagonal number.

It is an amenable number.

32961491809 is a deficient number, since it is larger than the sum of its proper divisors (181554).

32961491809 is an frugal number, since it uses more digits than its factorization.

32961491809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363106 (or 181553 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 32961491809 in words is "thirty-two billion, nine hundred sixty-one million, four hundred ninety-one thousand, eight hundred nine".