225953628161 has 4 divisors (see below), whose sum is σ = 237845924400. Its totient is φ = 214061331924.

The previous prime is 225953628139. The next prime is 225953628163. The reversal of 225953628161 is 161826359522.

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, and also an emirpimes, since its reverse is a distinct semiprime: 161826359522 = 2 ⋅80913179761.

It is a cyclic number.

It is not a de Polignac number, because 225953628161 - 2⁶ = 225953628097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225953628163) 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, 5946148091 + ... + 5946148128.

It is an arithmetic number, because the mean of its divisors is an integer number (59461481100).

Almost surely, 2^225953628161 is an apocalyptic number.

It is an amenable number.

225953628161 is a deficient number, since it is larger than the sum of its proper divisors (11892296239).

225953628161 is a wasteful number, since it uses less digits than its factorization.

225953628161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11892296238.

The product of its digits is 1555200, while the sum is 50.

The spelling of 225953628161 in words is "two hundred twenty-five billion, nine hundred fifty-three million, six hundred twenty-eight thousand, one hundred sixty-one".