225851617908 has 54 divisors (see below), whose sum is σ = 664111310226. Its totient is φ = 64529033184.

The previous prime is 225851617853. The next prime is 225851617961. The reversal of 225851617908 is 809716158522.

225851617908 is a `hidden beast` number, since 2 + 2 + 58 + 516 + 1 + 79 + 0 + 8 = 666.

225851617908 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 149337419364 + 76514198544 = 386442^2 + 276612^2 .

It is a super-2 number, since 2×225851617908² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 64015135 + ... + 64018662.

Almost surely, 2^225851617908 is an apocalyptic number.

225851617908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

225851617908 is an abundant number, since it is smaller than the sum of its proper divisors (438259692318).

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

225851617908 is a wasteful number, since it uses less digits than its factorization.

225851617908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128033821 (or 128033809 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 225851617908 in words is "two hundred twenty-five billion, eight hundred fifty-one million, six hundred seventeen thousand, nine hundred eight".