228140665605 has 24 divisors (see below), whose sum is σ = 403857522432. Its totient is φ = 119086190304.

The previous prime is 228140665603. The next prime is 228140665619. The reversal of 228140665605 is 506566041822.

228140665605 is a `hidden beast` number, since 2 + 2 + 81 + 4 + 0 + 6 + 6 + 560 + 5 = 666.

228140665605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 228140665605 - 2¹ = 228140665603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228140665603) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 53931849 + ... + 53936078.

It is an arithmetic number, because the mean of its divisors is an integer number (16827396768).

Almost surely, 2^228140665605 is an apocalyptic number.

It is an amenable number.

228140665605 is a deficient number, since it is larger than the sum of its proper divisors (175716856827).

228140665605 is a wasteful number, since it uses less digits than its factorization.

228140665605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107867985 (or 107867982 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 228140665605 in words is "two hundred twenty-eight billion, one hundred forty million, six hundred sixty-five thousand, six hundred five".