225617765687 has 4 divisors (see below), whose sum is σ = 231715543176. Its totient is φ = 219519988200.

The previous prime is 225617765683. The next prime is 225617765699. The reversal of 225617765687 is 786567716522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225617765687 - 2² = 225617765683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225617765683) 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 3 ways as a sum of consecutive naturals, for example, 3048888689 + ... + 3048888762.

It is an arithmetic number, because the mean of its divisors is an integer number (57928885794).

Almost surely, 2^225617765687 is an apocalyptic number.

225617765687 is a deficient number, since it is larger than the sum of its proper divisors (6097777489).

225617765687 is an equidigital number, since it uses as much as digits as its factorization.

225617765687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6097777488.

The product of its digits is 59270400, while the sum is 62.

The spelling of 225617765687 in words is "two hundred twenty-five billion, six hundred seventeen million, seven hundred sixty-five thousand, six hundred eighty-seven".