225665123641 has 4 divisors (see below), whose sum is σ = 225687550032. Its totient is φ = 225642697252.

The previous prime is 225665123617. The next prime is 225665123683. The reversal of 225665123641 is 146321566522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225665123641 - 2⁷ = 225665123513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225665123141) 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, 11198095 + ... + 11218228.

It is an arithmetic number, because the mean of its divisors is an integer number (56421887508).

Almost surely, 2^225665123641 is an apocalyptic number.

It is an amenable number.

225665123641 is a deficient number, since it is larger than the sum of its proper divisors (22426391).

225665123641 is a wasteful number, since it uses less digits than its factorization.

225665123641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22426390.

The product of its digits is 518400, while the sum is 43.

The spelling of 225665123641 in words is "two hundred twenty-five billion, six hundred sixty-five million, one hundred twenty-three thousand, six hundred forty-one".