225764671609 has 3 divisors (see below), whose sum is σ = 225765146757. Its totient is φ = 225764196462.

The previous prime is 225764671591. The next prime is 225764671619. The reversal of 225764671609 is 906176467522.

The square root of 225764671609 is 475147.

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: 906176467522 = 2 ⋅453088233761.

It is not a de Polignac number, because 225764671609 - 2¹¹ = 225764669561 is a prime.

It is a super-3 number, since 3×225764671609³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 225764671609.

It is not an unprimeable number, because it can be changed into a prime (225764671619) 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 2 ways as a sum of consecutive naturals, for example, 237574 + ... + 712720.

It is an arithmetic number, because the mean of its divisors is an integer number (75255048919).

Almost surely, 2^225764671609 is an apocalyptic number.

225764671609 is the 475147-th square number.

225764671609 is the 237574-th centered octagonal number.

It is an amenable number.

225764671609 is a deficient number, since it is larger than the sum of its proper divisors (475148).

225764671609 is an frugal number, since it uses more digits than its factorization.

225764671609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950294 (or 475147 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 225764671609 in words is "two hundred twenty-five billion, seven hundred sixty-four million, six hundred seventy-one thousand, six hundred nine".