228436140609 has 6 divisors (see below), whose sum is σ = 329963314226. Its totient is φ = 152290760400.

The previous prime is 228436140593. The next prime is 228436140637. The reversal of 228436140609 is 906041634822.

228436140609 is a `hidden beast` number, since 2 + 2 + 8 + 4 + 36 + 1 + 4 + 0 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 228431423025 + 4717584 = 477945^2 + 2172^2 .

It is not a de Polignac number, because 228436140609 - 2⁴ = 228436140593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228436140509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12690896692 + ... + 12690896709.

Almost surely, 2^228436140609 is an apocalyptic number.

It is an amenable number.

228436140609 is a deficient number, since it is larger than the sum of its proper divisors (101527173617).

228436140609 is a wasteful number, since it uses less digits than its factorization.

228436140609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25381793407 (or 25381793404 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 228436140609 in words is "two hundred twenty-eight billion, four hundred thirty-six million, one hundred forty thousand, six hundred nine".