325643441281 has 4 divisors (see below), whose sum is σ = 325931877700. Its totient is φ = 325355004864.

The previous prime is 325643441273. The next prime is 325643441303. The reversal of 325643441281 is 182144346523.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182144346523 = 24691 ⋅7376953.

It can be written as a sum of positive squares in 2 ways, for example, as 8016516225 + 317626925056 = 89535^2 + 563584^2 .

It is a cyclic number.

It is not a de Polignac number, because 325643441281 - 2³ = 325643441273 is a prime.

It is a super-2 number, since 2×325643441281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325643441251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144216516 + ... + 144218773.

It is an arithmetic number, because the mean of its divisors is an integer number (81482969425).

Almost surely, 2^325643441281 is an apocalyptic number.

It is an amenable number.

325643441281 is a deficient number, since it is larger than the sum of its proper divisors (288436419).

325643441281 is a wasteful number, since it uses less digits than its factorization.

325643441281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288436418.

The product of its digits is 552960, while the sum is 43.

The spelling of 325643441281 in words is "three hundred twenty-five billion, six hundred forty-three million, four hundred forty-one thousand, two hundred eighty-one".