225994989602 has 6 divisors (see below), whose sum is σ = 338993492859.
Its totient is φ = 112997158650.
The previous prime is 225994989587. The next prime is 225994989707. The reversal of 225994989602 is 206989499522.
It can be written as a sum of positive squares in only one way, i.e., 112997494801 + 112997494801 = 336151^2 + 336151^2
It is an ABA number since it can be written as A⋅BA, here for A=2, B=336151.
It is a Duffinian number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 504227 + ... + 840377.
Almost surely, 2225994989602 is an apocalyptic number.
225994989602 is a deficient number, since it is larger than the sum of its proper divisors (112998503257).
225994989602 is an frugal number, since it uses more digits than its factorization.
225994989602 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 672304 (or 336153 counting only the distinct ones).
The product of its (nonzero) digits is 50388480, while the sum is 65.
The spelling of 225994989602 in words is "two hundred twenty-five billion, nine hundred ninety-four million, nine hundred eighty-nine thousand, six hundred two".