228654199685 has 4 divisors (see below), whose sum is σ = 274385039628. Its totient is φ = 182923359744.

The previous prime is 228654199681. The next prime is 228654199687. The reversal of 228654199685 is 586991456822.

It is a Cunningham number, because it is equal to 478178²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82315052836 + 146339146849 = 286906^2 + 382543^2 .

It is a cyclic number.

It is not a de Polignac number, because 228654199685 - 2² = 228654199681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228654199681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22865419964 + ... + 22865419973.

It is an arithmetic number, because the mean of its divisors is an integer number (68596259907).

Almost surely, 2^228654199685 is an apocalyptic number.

It is an amenable number.

228654199685 is a deficient number, since it is larger than the sum of its proper divisors (45730839943).

228654199685 is an equidigital number, since it uses as much as digits as its factorization.

228654199685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45730839942.

The product of its digits is 74649600, while the sum is 65.

The spelling of 228654199685 in words is "two hundred twenty-eight billion, six hundred fifty-four million, one hundred ninety-nine thousand, six hundred eighty-five".