226643553378 has 90 divisors (see below), whose sum is σ = 545158912935. Its totient is φ = 67999866000.

The previous prime is 226643553371. The next prime is 226643553449. The reversal of 226643553378 is 873355346622.

226643553378 is a `hidden beast` number, since 2 + 2 + 6 + 6 + 4 + 35 + 533 + 78 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 194404273569 + 32239279809 = 440913^2 + 179553^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=336633.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (226643553371) 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, 2243995528 + ... + 2243995628.

Almost surely, 2^226643553378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 226643553378

226643553378 is an abundant number, since it is smaller than the sum of its proper divisors (318515359557).

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

226643553378 is an frugal number, since it uses more digits than its factorization.

226643553378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 117 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 54.

The spelling of 226643553378 in words is "two hundred twenty-six billion, six hundred forty-three million, five hundred fifty-three thousand, three hundred seventy-eight".