225908943138 has 90 divisors (see below), whose sum is σ = 512446775841. Its totient is φ = 74385463536.

The previous prime is 225908943101. The next prime is 225908943193. The reversal of 225908943138 is 831349809522.

225908943138 is a `hidden beast` number, since 2 + 2 + 590 + 8 + 9 + 43 + 1 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 212776470729 + 13132472409 = 461277^2 + 114597^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=336087.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 44 ways as a sum of consecutive naturals, for example, 647303388 + ... + 647303736.

Almost surely, 2^225908943138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225908943138

225908943138 is an abundant number, since it is smaller than the sum of its proper divisors (286537832703).

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

225908943138 is an frugal number, since it uses more digits than its factorization.

225908943138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 225908943138 in words is "two hundred twenty-five billion, nine hundred eight million, nine hundred forty-three thousand, one hundred thirty-eight".