225661473165 has 16 divisors (see below), whose sum is σ = 361920081600. Its totient is φ = 120065544192.

The previous prime is 225661473139. The next prime is 225661473181. The reversal of 225661473165 is 561374166522.

It is not a de Polignac number, because 225661473165 - 2⁶ = 225661473101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17946100 + ... + 17958669.

It is an arithmetic number, because the mean of its divisors is an integer number (22620005100).

Almost surely, 2^225661473165 is an apocalyptic number.

It is an amenable number.

225661473165 is a deficient number, since it is larger than the sum of its proper divisors (136258608435).

225661473165 is a wasteful number, since it uses less digits than its factorization.

225661473165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35905196.

The product of its digits is 1814400, while the sum is 48.

The spelling of 225661473165 in words is "two hundred twenty-five billion, six hundred sixty-one million, four hundred seventy-three thousand, one hundred sixty-five".