228191109633 has 80 divisors (see below), whose sum is σ = 363439897920. Its totient is φ = 142186558464.

The previous prime is 228191109631. The next prime is 228191109673. The reversal of 228191109633 is 336901191822.

It is a happy number.

228191109633 is a `hidden beast` number, since 2 + 2 + 8 + 1 + 9 + 1 + 1 + 0 + 9 + 633 = 666.

It is not a de Polignac number, because 228191109633 - 2¹ = 228191109631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228191109631) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 177856810 + ... + 177858092.

It is an arithmetic number, because the mean of its divisors is an integer number (4542998724).

Almost surely, 2^228191109633 is an apocalyptic number.

It is an amenable number.

228191109633 is a deficient number, since it is larger than the sum of its proper divisors (135248788287).

228191109633 is a wasteful number, since it uses less digits than its factorization.

228191109633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108 (or 2099 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 228191109633 in words is "two hundred twenty-eight billion, one hundred ninety-one million, one hundred nine thousand, six hundred thirty-three".