225105101136661 has 4 divisors (see below), whose sum is σ = 225106205841792. Its totient is φ = 225103996431532.

The previous prime is 225105101136581. The next prime is 225105101136677. The reversal of 225105101136661 is 166631101501522.

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 225105101136661 - 2¹⁹ = 225105100612373 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225105101136961) 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, 552046855 + ... + 552454468.

It is an arithmetic number, because the mean of its divisors is an integer number (56276551460448).

Almost surely, 2^{225105101136661} is an apocalyptic number.

It is an amenable number.

225105101136661 is a deficient number, since it is larger than the sum of its proper divisors (1104705131).

225105101136661 is a wasteful number, since it uses less digits than its factorization.

225105101136661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104705130.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 225105101136661 in words is "two hundred twenty-five trillion, one hundred five billion, one hundred one million, one hundred thirty-six thousand, six hundred sixty-one".