225626718258 has 18 divisors (see below), whose sum is σ = 488862255999. Its totient is φ = 75208234332.

The previous prime is 225626718257. The next prime is 225626718259. The reversal of 225626718258 is 852817626522.

225626718258 is a `hidden beast` number, since 2 + 2 + 5 + 626 + 7 + 1 + 8 + 2 + 5 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (225626718257) and next prime (225626718259).

It can be written as a sum of positive squares in only one way, i.e., 112813359129 + 112813359129 = 335877^2 + 335877^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=335877.

It is not an unprimeable number, because it can be changed into a prime (225626718257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1959283 + ... + 2071241.

Almost surely, 2^225626718258 is an apocalyptic number.

225626718258 is an abundant number, since it is smaller than the sum of its proper divisors (263235537741).

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

225626718258 is an frugal number, since it uses more digits than its factorization.

225626718258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223926 (or 111964 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The spelling of 225626718258 in words is "two hundred twenty-five billion, six hundred twenty-six million, seven hundred eighteen thousand, two hundred fifty-eight".