225523445424545 has 8 divisors (see below), whose sum is σ = 273668900066280. Its totient is φ = 178391579301760.

The previous prime is 225523445424503. The next prime is 225523445424559. The reversal of 225523445424545 is 545424544325522.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3915950223376 + 221607495201169 = 1978876^2 + 14886487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225523445424545 - 2⁶ = 225523445424481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253397129246 + ... + 253397130135.

It is an arithmetic number, because the mean of its divisors is an integer number (34208612508285).

Almost surely, 2^{225523445424545} is an apocalyptic number.

It is an amenable number.

225523445424545 is a deficient number, since it is larger than the sum of its proper divisors (48145454641735).

225523445424545 is an equidigital number, since it uses as much as digits as its factorization.

225523445424545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506794259475.

The product of its digits is 153600000, while the sum is 56.

The spelling of 225523445424545 in words is "two hundred twenty-five trillion, five hundred twenty-three billion, four hundred forty-five million, four hundred twenty-four thousand, five hundred forty-five".