225661472655 has 32 divisors (see below), whose sum is σ = 368012574720. Its totient is φ = 118036464000.

The previous prime is 225661472651. The next prime is 225661472681. The reversal of 225661472655 is 556274166522.

It is not a de Polignac number, because 225661472655 - 2² = 225661472651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225661472598 and 225661472607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225661472651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2060530 + ... + 2167280.

It is an arithmetic number, because the mean of its divisors is an integer number (11500392960).

Almost surely, 2^225661472655 is an apocalyptic number.

225661472655 is a deficient number, since it is larger than the sum of its proper divisors (142351102065).

225661472655 is a wasteful number, since it uses less digits than its factorization.

225661472655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109471.

The product of its digits is 6048000, while the sum is 51.

The spelling of 225661472655 in words is "two hundred twenty-five billion, six hundred sixty-one million, four hundred seventy-two thousand, six hundred fifty-five".