225787968018 has 90 divisors (see below), whose sum is σ = 520491556431. Its totient is φ = 73155954816.

The previous prime is 225787968013. The next prime is 225787968031. The reversal of 225787968018 is 810869787522.

It can be written as a sum of positive squares in 5 ways, for example, as 168376453569 + 57411514449 = 410337^2 + 239607^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=335997.

It is not an unprimeable number, because it can be changed into a prime (225787968013) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 223773498 + ... + 223774506.

Almost surely, 2^225787968018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225787968018

225787968018 is an abundant number, since it is smaller than the sum of its proper divisors (294703588413).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225787968018 is an frugal number, since it uses more digits than its factorization.

225787968018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 225787968018 in words is "two hundred twenty-five billion, seven hundred eighty-seven million, nine hundred sixty-eight thousand, eighteen".